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techtalk:ih:carb01 [2019/10/08 01:41]
hippysmack [Sportster Keihin Butterfly Carburetors by Year Model]
techtalk:ih:carb01 [2024/02/22 01:09] (current)
hippysmack [Sub Documents]
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 [[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]] [[:​techtalk:​menu|{{ ​ :​techtalk:​gototechnicalmenu.jpg|}}]]
-====== IH: Carburetor, Intake Manifold & Exhaust ​Systems ​======+====== IH: Carburetor, Intake Manifold & Exhaust ======
  
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 A few are well done and re-stamped as DC11 ( probably by Harley for racers). Some very poor quality backyard jobs with the idle ports ruined, so look them over carefully. \\ A few are well done and re-stamped as DC11 ( probably by Harley for racers). Some very poor quality backyard jobs with the idle ports ruined, so look them over carefully. \\
  
-^Sportster \\ Carb Model^Idle Bleed^Idle Tube \\ Feed^Fixed Jet^Throttle \\ Disc^High \\ Speed \\ Setting^Idle Speed \\ Setting^+^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}||||||| 
 +|Sportster \\ Carb Model|Idle Bleed|Idle Tube \\ Feed|Fixed Jet|Throttle \\ Disc|High \\ Speed \\ Setting|Idle Speed \\ Setting|
 |**27155-57** ((1952-1957 HD Spare Parts Catalog pg 15 for all Sportster and K models)) **1957-1958 Sportster**||||||| |**27155-57** ((1952-1957 HD Spare Parts Catalog pg 15 for all Sportster and K models)) **1957-1958 Sportster**|||||||
-|DC-1 ((HD TSB #389 dated 5-1-57)) \\ Standard \\ 1957 (only)|#53 .0595|#69 .0293|#9 .067|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 3/4" to 1" ​ ((HD 1959-1964 Sportster FSM))|+|DC-1 ((HD TSB #389 dated 5-1-57)) \\ Standard \\ 1957 (only)|#53 .0595|#69 .0293|#9 .067|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 3/4" to 1" ​ ((HD 1959-1964 Sportster FSM))|
 |**27155-57A** ((1952-1959 HD Spare Parts Catalog pg 16 for all Sportster and K models)) **1959-1960 Sportster**||||||| ​ |**27155-57A** ((1952-1959 HD Spare Parts Catalog pg 16 for all Sportster and K models)) **1959-1960 Sportster**||||||| ​
-|DC-1L ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ 1958-1960|#​53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 1" to 1-1/4" ((HD 1959-1964 Sportster FSM))|  +|DC-1L ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ 1958-1960|#​53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 1" to 1-1/4" ((HD 1959-1964 Sportster FSM))|  
-|DC-1M ((HD TSB #389 dated 5-1-57)) \\ Miltary XLA|#53 .0595|#69 .0293|#1 .052|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 1" ((HD 1959-1964 Sportster FSM))| ​+|DC-1M ((HD TSB #389 dated 5-1-57)) \\ Miltary XLA|#53 .0595|#69 .0293|#1 .052|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 1" ((HD 1959-1964 Sportster FSM))| ​
 |**27155-57B** ((1959-1961 HD Spare Parts Catalog Supplement for all Sportster and K models)) **1961-1965 Sportster**||||||| |**27155-57B** ((1959-1961 HD Spare Parts Catalog Supplement for all Sportster and K models)) **1961-1965 Sportster**|||||||
-|DC-6 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ 1961|#53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2)) | +|DC-6 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ 1961|#53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2)) | 
-|DC-10 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ 1962-E1963|#​53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2))| 3/4" to 1-1/4" | 1" to 1-1/4" ((HD 1959-1964 Sportster FSM))|  +|DC-10 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ 1962-E1963|#​53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2))| 3/4" to 1-1/4" | 1" to 1-1/4" ((HD 1959-1964 Sportster FSM))|  
-|DC-12 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ L1963-1965|#​53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​=691253&​highlight=Linkert&​page=2))|+|DC-12 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ Standard \\ L1963-1965|#​53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?t=691253&​highlight=Linkert&​page=2))|
  
-^Other HD Carb Model^Idle Bleed^Idle Tube \\ Feed^Fixed Jet^Throttle \\ Disc^High \\ Speed \\ Setting^Idle Speed \\ Setting^ +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}||||||| 
-|DC-2 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ 1959-65 Servicar \\ (smaller venturi, opposite float bowl)|#51 .067|#70 .028|#20 .0452|12 ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 1" to 1-1/4" ((HD 1959-1964 Sportster FSM))|  +|Other HD Carb Model|Idle Bleed|Idle Tube \\ Feed|Fixed Jet|Throttle \\ Disc|High \\ Speed \\ Setting|Idle Speed \\ Setting| 
-|DC-7 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ 1966 Big-Twin FL and FLH \\ (larger venturi)|#​53 .0595|#69 .0293| ​   .070|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=691253&​highlight=Linkert&​page=2))| +|DC-2 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ 1959-65 Servicar \\ (smaller venturi, ​\\ opposite float bowl)|#51 .067|#70 .028|#20 .0452|12 ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2)) | 3/4" to 1-1/4" | 1" to 1-1/4" ((HD 1959-1964 Sportster FSM))|  
-|DC-12 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ 1966 Big-Twin FL and FLH|#53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​=691253&​highlight=Linkert&​page=2))|+|DC-7 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ 1966 Big-Twin FL and FLH \\ (larger venturi)|#​53 .0595|#69 .0293|.070|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?​t=691253&​highlight=Linkert&​page=2))| 
 +|DC-12 ((http://​www.classic-motorcycle-build.com/​linkert-dc-carb.html)) \\ 1966 Big-Twin FL and FLH|#53 .0595|#69 .0293|#4 .0625|9A ((thefrenchowl from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​87592-linkert-dc-model-for-1961-xlch/​page2?t=691253&​highlight=Linkert&​page=2))|
  
 ===== Tillotson HD Carb (1966-1971) =====  ===== Tillotson HD Carb (1966-1971) ===== 
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     * Intake Manifold (27021-57) ((HD Sportster Parts Catalog (99451-78B) ))      * Intake Manifold (27021-57) ((HD Sportster Parts Catalog (99451-78B) )) 
     ​     ​
-| **HD-1A** was the 66 version, no pump check ball, used the no drill insulator and the "​wraparound"​ cable bracket is the same as the 67-71. 66 uses the Linkert bracket ((Dr Dick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1567534&​page=4)) \\ Fuel pressure and the weight of the needle alone move the needle away from the inlet seat. ((HD Service Bulletin #547 dated October 24th, 1966 pg OC-237))| +| **HD-1A** was the 66 version, no pump check ball, used the no drill insulator and the "​wraparound"​ cable bracket is the same as the 67-71. 66 uses the Linkert bracket ((Dr Dick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​144565-disaster-averted/​page4?​t=1567534&​page=4)) \\ Fuel pressure and the weight of the needle alone move the needle away from the inlet seat. ((HD Service Bulletin #547 dated October 24th, 1966 pg OC-237))| 
-|**HD-1B ** Starting after engine #​66XLCH-10611,​ the carb has a new inlet valve lever, needle and seat assembly to help correct problems such as high speed leaning out caused by vibration and needle sticking due to dirt / debris in carburetor. The stamped ID has the model stamped on the flange near the idle mixture adjustment wheel. \\ The new lever had a forked end which engaged a groove in the new inlet needle seat stem which locked the lever to the needle providing diaphragm control of the needle movement in both directions. \\ It was recommended to install this update into the HD-1A carb (where definite carburetor problems exist) ((HD Service Bulletin #547 dated October 24th, 1966 pg OC-237)) \\ 67-E68 used the '​standard'​ choke and throttle shafts, no pump check, insulator gets drilled for over the top. Same pn. This insulator gets used on e67CH, 70-71CH and 67-71 XLH.  \\ 67-69 CH gets its own insulator. New pn for this one. Same part as others, this vintage except the lower stud is now longer for the plug wire router to mount.((Dr Dick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1567534&​page=4))| +|**HD-1B ** Starting after engine #​66XLCH-10611,​ the carb has a new inlet valve lever, needle and seat assembly to help correct problems such as high speed leaning out caused by vibration and needle sticking due to dirt / debris in carburetor. The stamped ID has the model stamped on the flange near the idle mixture adjustment wheel. \\ The new lever had a forked end which engaged a groove in the new inlet needle seat stem which locked the lever to the needle providing diaphragm control of the needle movement in both directions. \\ It was recommended to install this update into the HD-1A carb (where definite carburetor problems exist) ((HD Service Bulletin #547 dated October 24th, 1966 pg OC-237)) \\ 67-E68 used the '​standard'​ choke and throttle shafts, no pump check, insulator gets drilled for over the top. Same pn. This insulator gets used on e67CH, 70-71CH and 67-71 XLH.  \\ 67-69 CH gets its own insulator. New pn for this one. Same part as others, this vintage except the lower stud is now longer for the plug wire router to mount.((Dr Dick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​144565-disaster-averted/​page4?​t=1567534&​page=4))| 
-|**HD-1BC** or **HD-1C** ​ Late 1968 Sportsters ( Carb # 27162-66B) received a ball check valve in the accelerating pump passage of the plastic cover which provides a seal against air bleeding back from the venturi into the fuel chamber. ((Shop Dope Vol 4 Service Bulletin No 571 May 21, 1968)). \\ L68-69 HD1C gets the pump check.((Dr Dick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1567534&​page=4)) \\ 70-71 HD1D different body casting. may be different low speed circuit.((Dr Dick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1567534&​page=4))|+|**HD-1BC** or **HD-1C** ​ Late 1968 Sportsters ( Carb # 27162-66B) received a ball check valve in the accelerating pump passage of the plastic cover which provides a seal against air bleeding back from the venturi into the fuel chamber. ((Shop Dope Vol 4 Service Bulletin No 571 May 21, 1968)). \\ L68-69 HD1C gets the pump check.((Dr Dick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​144565-disaster-averted/​page4?​t=1567534&​page=4)) \\ 70-71 HD1D different body casting. may be different low speed circuit.((Dr Dick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​144565-disaster-averted/​page4?​t=1567534&​page=4))|
  
 |**HD-2A** \\ **HD-2AB** \\ **HD-2B**|Electra Glide models ((HD Service Bulletin #547 dated October 24th, 1966 pg OC-237)) \\ w / pre lever needle and seat assembly| |**HD-2A** \\ **HD-2AB** \\ **HD-2B**|Electra Glide models ((HD Service Bulletin #547 dated October 24th, 1966 pg OC-237)) \\ w / pre lever needle and seat assembly|
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 **Tillotson Carbs** (1968-1971) ((Shop Dope Vol 4 Service Bulletin No 571 May 21, 1968)) ((1970-2010 Haynes Sportster Service and Repair Manual pg 3.1)) **Tillotson Carbs** (1968-1971) ((Shop Dope Vol 4 Service Bulletin No 571 May 21, 1968)) ((1970-2010 Haynes Sportster Service and Repair Manual pg 3.1))
  
-^Serial Number^Main Jet^ +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|| 
-|27160-66B ((rivethog of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=757993&​page=2)) \\ Big Twin|  | +|Serial Number|Main Jet| 
-|27162-66B((Shop Dope Vol 4 Service Bulletin No 571 May 21, 1968))| ​   | +|27160-66B ((rivethog of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​92522-another-tillotson-magneto-hard-to-start-xlch-question/​page2?​t=757993&​page=2)) \\ Big Twin|  | 
-|27162-66C((HD Sportster Parts Catalog pg B11-1 (99451-78B) ))|0.053",​ 0.055",​ 0.059",​ 0.057",​ 0.061",​ 0.063"​((HD Sportster Parts Catalog pg B11-1 (99451-78B) ))|+|27162-66B ((Shop Dope Vol 4 Service Bulletin No 571 May 21, 1968)) ​\\ Sportster|    | 
 +|27162-66C ((HD Sportster Parts Catalog pg B11-1 (99451-78B) )) \\ Sportster|0.053",​ 0.055",​ 0.059",​ 0.057",​ 0.061",​ 0.063" ((HD Sportster Parts Catalog pg B11-1 (99451-78B) ))|
 |27155-66RA (XLR)|(27823-66R)| |27155-66RA (XLR)|(27823-66R)|
 |27155-70R (XR)|(27823-66R)| |27155-70R (XR)|(27823-66R)|
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 |              |Diaphragm Cover Plug | 23-28 in/lbs (2.6-3Nm) | |              |Diaphragm Cover Plug | 23-28 in/lbs (2.6-3Nm) |
 |Carb Idle Speed| 900- 1,100 RPM ((Clymer Sportster Repair Manual 1959-1985))|| ​ |Carb Idle Speed| 900- 1,100 RPM ((Clymer Sportster Repair Manual 1959-1985))|| ​
-  ​ 
-===== Mikuni (XR-750 racing engines only) ===== 
  
-**1972-1980**+===== Mikuni XR-750 racing engines only ===== 
 + 
 +**1972-1980** ​\\
  
-Through 1980, XR-750 engines were equipped with a 36mm Round Slide((http://​xlforum.net/​forums/showthread.php?​t=2006195&​page=3)) Mikuni. Below is a chart of the standard jetting of these carbs. Final jetting may vary. ((1972-2003 HD XR-750 Service ​Manua pg 39))+Through 1980, XR-750 engines were equipped with a 36mm Round Slide((https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​188431-to-keihin-fcr-or-not/​page3?​t=2006195&​page=3)) Mikuni. Below is a chart of the standard jetting of these carbs. Final jetting may vary. ((1972-2003 HD XR-750 Service ​Manual ​pg 39))
  
 +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|||||||
 |36mm Carb Types|Main|Pilot|Needle|Needle Jet|Slide|Air Correction Jet| |36mm Carb Types|Main|Pilot|Needle|Needle Jet|Slide|Air Correction Jet|
 |VM-36-1 \\ VM-36-4 \\ VM36/​39|240|25|6F5|159-P4|2.0|1.0| ​ |VM-36-1 \\ VM-36-4 \\ VM36/​39|240|25|6F5|159-P4|2.0|1.0| ​
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 **1989-2003** **1989-2003**
  
-Engine upgrades prompted HD to recommend the use of Mikuni'​s 38mm Flat Slide carburetor (not supplied with the engine kit). Recommended jetting chart below.((1972-2003 HD XR-750 Service ​Manua pg 39))+Engine upgrades prompted HD to recommend the use of Mikuni'​s 38mm Flat Slide carburetor (not supplied with the engine kit). Recommended jetting chart below.((1972-2003 HD XR-750 Service ​Manual ​pg 39))
  
-|38mm Carb Types|Main|Pilot|Needle Jet|Slide|+^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|||||| 
 +|38mm Carb Types|Main|Pilot|Needle Jet|Slide||
 |TM38-85 (47mm spigot dia.) \\ TM38-86 (43mm spigot dia.)|210-260|20-25|6FM46|Q0,​Q2,​Q4|4.0| |TM38-85 (47mm spigot dia.) \\ TM38-86 (43mm spigot dia.)|210-260|20-25|6FM46|Q0,​Q2,​Q4|4.0|
  
-  * Most Mikuni carbs have a backwards Idle mix screw, in to richen, out to lean. ((ryder rick from the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​postid=5514564#​post5514564)) +  * Most Mikuni carbs have a backwards Idle mix screw, in to richen, out to lean. ((ryder rick from the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​188792-drag-pipes/​page4?​postid=5514564#​post4058314)) 
-  * The longer carb provides a better signal to the fuel metering business inside. This is why the round slide carb works so well combined with the taper on the slide and needle. The round slide carb will have a wider sweet spot than a flat slide ((ryder rick http://​xlforum.net/​forums/showthread.php?​threadid=2006195)) and that equates to better low range. ((big_sleezy ​http://​xlforum.net/​forums/showthread.php?​t=2006195&​page=2))+  * The longer carb provides a better signal to the fuel metering business inside. This is why the round slide carb works so well combined with the taper on the slide and needle. The round slide carb will have a wider sweet spot than a flat slide ((ryder rick https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​188431-to-keihin-fcr-or-not?​threadid=2006195)) and that equates to better low range. ((big_sleezy ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​188431-to-keihin-fcr-or-not/​page2?​t=2006195&​page=2))
  
 ===== Mikuni (general application) ===== ===== Mikuni (general application) =====
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 The VM series carbs are round slide Mikunis, 34, 36, 38 MM etc. Only Mikuni round slide carbs are designated as VM. The VM series carbs are round slide Mikunis, 34, 36, 38 MM etc. Only Mikuni round slide carbs are designated as VM.
-Mikuni lists the following Vintage Carb Kits: ((piniongear of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=765846&​page=8)) \\+Mikuni lists the following Vintage Carb Kits: ((piniongear of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93137-mikuni-vm38-success-story/​page8?​t=765846&​page=8)) \\
 001-200....HDS-101/​38mm.... Sportster/​Shovelhead \\ 001-200....HDS-101/​38mm.... Sportster/​Shovelhead \\
 001-204....HDS-101A/​40mm.... Sportster/​Shovelhead \\ 001-204....HDS-101A/​40mm.... Sportster/​Shovelhead \\
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 So any of these 3 sizes will work. So any of these 3 sizes will work.
  
-The correct version of the VM38 for an ironhead Sportster is the VM38-9. ((IronMick of the XLFORUM http://xlforum.net/​forums/​showthread.php?t=1814834&page=2)) ((piniongear of the XLFORUM http://​xlforum.net/​forums/showthread.php?t=765846&​page=3)) ((piniongear of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=765846&​page=4)) \\ +^{{techtalk:miscres:​instruction_sheet_header_4.png?nolink&850|}}|| 
-The VM38-"​9"​ was setup and extensively tested by Jerry Branch for the stock Sportster engine using flow bench tech for the time. ((simeli of the XLFORUM http://​xlforum.net/forums/showthread.php?​t=1636803&​page=2)) \\+|**Mikuni** (**XR-750 Racing Engines Only**)|| 
 +|VM-36-1 \\ VM-36-4 \\ VM36/​39|1972-1980 XR-750 / 36 mm with a round slide ((https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​188431-to-keihin-fcr-or-not/​page3?t=2006195&​page=3))((1972-2003 HD XR-750 Service Manual pg 39))| 
 +|TM38-85 (47mm spigot dia.) \\ TM38-86 (43mm spigot dia.) \\ TM38-85 (47mm spigot dia.) \\ TM38-86 ​(43mm spigot dia.)|1989-2003 XR-750 ​38 mm with a flat slide((1972-2003 HD XR-750 Service Manual pg 39))|
  
 +The correct version of the VM38 for an ironhead Sportster is the VM38-9. ((IronMick of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​169173-mikuni-sticks-out-too-far/​page2?​t=1814834&​page=2)) ((piniongear of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93137-mikuni-vm38-success-story/​page3?​t=765846&​page=3)) ((piniongear of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93137-mikuni-vm38-success-story/​page4?​t=765846&​page=4)) \\
 +The VM38-"​9"​ was setup and extensively tested by Jerry Branch for the stock Sportster engine using flow bench tech for the time. ((simeli of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​151596-re-jetting-the-vm38-9-2/​page2?​t=1636803&​page=2)) \\
 +
 +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|||||||
 |38mm Carb Types|Main|Pilot|Needle Jet|Throttle Valve|Jet Needle|Air Jet| |38mm Carb Types|Main|Pilot|Needle Jet|Throttle Valve|Jet Needle|Air Jet|
-|VM38-9 (43mm spigot)((IronMick ​http://​xlforum.net/​forums/showthread.php?​t=2006195&​page=2))|330|30|Q-2|2.5|6DP1|0.5 \\ 2.0|+|VM38-9 (43mm spigot)((IronMick ​of the XLFORUM https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​188431-to-keihin-fcr-or-not/​page2?​t=2006195&​page=2))|330|30|Q-2|2.5|6DP1|0.5 \\ 2.0|
    
 ===== Bendix/ Zenith I6P12 Carb (1972-Early 1976) ===== ===== Bendix/ Zenith I6P12 Carb (1972-Early 1976) =====
Line 203: Line 214:
     * Intake manifold ( 27021-71A )(( HD Sportster Parts Catalog (99451-78B) ))     * Intake manifold ( 27021-71A )(( HD Sportster Parts Catalog (99451-78B) ))
  
-^Year Model XLH/ XLCH^Serial Number^Main Jet Sizes (mm)^Low Speed Idle Jet^^+^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}||||| 
 +|Year Model XLH/ XLCH|Serial Number|Main Jet Sizes (mm)|Low Speed Idle Jet||
 |**E1972**|27155-72 ((1972,1973 HD Sportster Parts Catalog Supplements (99451-72), (99451-73) )) |0.90mm (27612-71)|**Early '72** (27749-72) \\ **Late '​72-'​74** (27750-72)|| |**E1972**|27155-72 ((1972,1973 HD Sportster Parts Catalog Supplements (99451-72), (99451-73) )) |0.90mm (27612-71)|**Early '72** (27749-72) \\ **Late '​72-'​74** (27750-72)||
-|**L1972-1974**|27155-72A ((1973, 1974 HD Sportster Parts Catalog Supplements (99451-73) (99451-74) ))|**Late '​72-'​73** \\ 0.95mm (27614-71) \\ 1.00mm (27618-71) \\ 1.05mm (27619-71 standard) \\ **Added in L'​74-E'​76** \\ 1.10mm (27620-71 standard) ((The Doctor71 of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=2073320)) \\ 1.15mm (27621-71) \\ 1.20mm (27622-71) \\ 1.25mm (27623-71)|:::​|:::​| ​+|**L1972-1974**|27155-72A ((1973, 1974 HD Sportster Parts Catalog Supplements (99451-73) (99451-74) ))|**Late '​72-'​73** \\ 0.95mm (27614-71) \\ 1.00mm (27618-71) \\ 1.05mm (27619-71 standard) \\ **Added in L'​74-E'​76** \\ 1.10mm (27620-71 standard) ((The Doctor71 of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​196742-bendix-main-jet?​t=2073320)) \\ 1.15mm (27621-71) \\ 1.20mm (27622-71) \\ 1.25mm (27623-71)|:::​|:::​| ​
 |**1975-Early 1976** \\ Including all '​71-'​75 FX models| 27155-72B ((1975 HD Sportster Parts Catalog Supplement (99451-75) )) ((1976 HD Sportster Parts Catalog Supplement (99451-76) )) ((1971-1984 HD FX Parts Catalog pg 35)) |:::​|:::​|:::​| |**1975-Early 1976** \\ Including all '​71-'​75 FX models| 27155-72B ((1975 HD Sportster Parts Catalog Supplement (99451-75) )) ((1976 HD Sportster Parts Catalog Supplement (99451-76) )) ((1971-1984 HD FX Parts Catalog pg 35)) |:::​|:::​|:::​|
-^  Bendix Main Jet Identification ((Shop Dope Service Bulletin #697 dated March 29, 1976))  ​^^^^^ +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}||||| 
-^Model Info^HD Main Jet Part #^Bendix Main Jet Part #^Bendix Main Jet Size^Drill Size^+ ​Bendix Main Jet Identification ((Shop Dope Service Bulletin #697 dated March 29, 1976))  ​||||| 
 +|Model Info|HD Main Jet Part #|Bendix Main Jet Part #|Bendix Main Jet Size|Drill Size|
 |1972-1974 XL, XLCH \\ 1971-1975 FL, FLH, FX, FXE|27612-71 \\ 27614-71 \\ 27618-71 \\ 27619-71 \\ 27620-71 \\ 27621-71 \\ 27622-71 \\ 27623-71|C66-173 \\ C66-174 \\ C66-155 \\ C66-156 \\ C66-157 \\ C66-143 \\ C66-158 \\ C66-159|18 \\ 19 \\ 20 \\ 21 \\ 22 \\ 23 \\ 24 \\ 25|0.90 mm (0.0354"​) \\ 0.95 mm (0.0374"​) \\ 1.00 mm (0.0394"​) \\ 1.05 mm (0.0413"​) \\ 1.10 mm (0.0433"​) \\ 1.15 mm (0.0453"​) \\ 1.20 mm (0.0472"​) \\ 1.25 mm (0.0492"​)| |1972-1974 XL, XLCH \\ 1971-1975 FL, FLH, FX, FXE|27612-71 \\ 27614-71 \\ 27618-71 \\ 27619-71 \\ 27620-71 \\ 27621-71 \\ 27622-71 \\ 27623-71|C66-173 \\ C66-174 \\ C66-155 \\ C66-156 \\ C66-157 \\ C66-143 \\ C66-158 \\ C66-159|18 \\ 19 \\ 20 \\ 21 \\ 22 \\ 23 \\ 24 \\ 25|0.90 mm (0.0354"​) \\ 0.95 mm (0.0374"​) \\ 1.00 mm (0.0394"​) \\ 1.05 mm (0.0413"​) \\ 1.10 mm (0.0433"​) \\ 1.15 mm (0.0453"​) \\ 1.20 mm (0.0472"​) \\ 1.25 mm (0.0492"​)|
 |1975 and later XL, XLCH \\ Late 1975 FL, FLH, FX, FXE|27651-75 \\ 27652-75 \\ 27653-75 \\ 27654-75 \\ 27655-75 \\ 27656-75|C66-183-19 \\ C66-183-20 \\ C66-183-21 \\ C66-183 \\ C66-183-23 \\ C66-183-24|19 \\ 20 \\ 21 \\ 22 \\ 23 \\ 24|0.95 mm (0.0374"​) \\ 1.00 mm (0.0394"​) \\ 1.05 mm (0.0413"​) \\ 1.10 mm (0.0433"​) \\ 1.15 mm (0.0453"​) \\ 1.20 mm (0.0472"​)| |1975 and later XL, XLCH \\ Late 1975 FL, FLH, FX, FXE|27651-75 \\ 27652-75 \\ 27653-75 \\ 27654-75 \\ 27655-75 \\ 27656-75|C66-183-19 \\ C66-183-20 \\ C66-183-21 \\ C66-183 \\ C66-183-23 \\ C66-183-24|19 \\ 20 \\ 21 \\ 22 \\ 23 \\ 24|0.95 mm (0.0374"​) \\ 1.00 mm (0.0394"​) \\ 1.05 mm (0.0413"​) \\ 1.10 mm (0.0433"​) \\ 1.15 mm (0.0453"​) \\ 1.20 mm (0.0472"​)|
-|Bendix part # is stamped on the hex head side of the jet. The standard 1.10 mm for 1975 and later carbs is only labeled C66-183. All other jets for '75 & later models have the full # with suffix|||||+|Bendix part # is stamped on the hex head side of the jet. \\ The standard 1.10 mm for 1975 and later carbs is only labeled C66-183. All other jets for '75 & later models have the full # with suffix|||||
 |Carb Idle Speed | 700- 900 RPM ((Clymer Sportster Repair Manual 1959-1985))|||| ​ |Carb Idle Speed | 700- 900 RPM ((Clymer Sportster Repair Manual 1959-1985))|||| ​
  
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 ==== Sub Documents ==== ==== Sub Documents ====
  
-  * [[techtalk:​ih:​carb01p|Keihin Butterfly Carb Identificaton]]+  * [[techtalk:​ih:​carb01p|Keihin Butterfly Carb Identification]]
   * [[techtalk:​ih:​carb01q|Rebuilding a Keihin Butterfly Carb]]   * [[techtalk:​ih:​carb01q|Rebuilding a Keihin Butterfly Carb]]
   * [[techtalk:​ih:​carb01r|Keihin Butterfly Carb Function and Tuning]]   * [[techtalk:​ih:​carb01r|Keihin Butterfly Carb Function and Tuning]]
Line 229: Line 242:
     * **Operation**:​ Fuel from the gas tank passes through the fuel valve, onto float chamber. The fuel entering causes the float to rise until it shuts off the fuel valve, stopping the flow at a level predetermined by float level setting. ​ ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))     * **Operation**:​ Fuel from the gas tank passes through the fuel valve, onto float chamber. The fuel entering causes the float to rise until it shuts off the fuel valve, stopping the flow at a level predetermined by float level setting. ​ ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))
     * **Idle or Slow System**: The slow system functions at idle, low and intermediate speeds when throttle valve is closed or only partially open. At idle, fuel enters the main jet and, after being metered there, enters the slow jet where it is metered again. Fuel from the slow jet enters the slow jet bleed tube where it mixes with air through the slow air passage. Fuel mixture is regulated by adjusting the idle (low speed) mixture screw. When the throttle valve is closed, fuel mixture flows into the venture almost entirely through the idle port. As the throttle valve gradually opens, fuel mix discharge is transferred to the bypass. The slow jet bleed tube is actually a part of the slow jet. ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))     * **Idle or Slow System**: The slow system functions at idle, low and intermediate speeds when throttle valve is closed or only partially open. At idle, fuel enters the main jet and, after being metered there, enters the slow jet where it is metered again. Fuel from the slow jet enters the slow jet bleed tube where it mixes with air through the slow air passage. Fuel mixture is regulated by adjusting the idle (low speed) mixture screw. When the throttle valve is closed, fuel mixture flows into the venture almost entirely through the idle port. As the throttle valve gradually opens, fuel mix discharge is transferred to the bypass. The slow jet bleed tube is actually a part of the slow jet. ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))
-    * **The Main System**: The main system functions at intermediate and high speeds as the throttle valve opens further. Fuel is metered by the main jet and enters the main jet air passage. The fuel/ air mixture then exits from the main nozzle and into the venturi. ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))+    * **The Main System**: The main system functions at intermediate and high speeds as the throttle valve opens further. Fuel is metered by the main jet and enters the main jet air passage. The fuel/air mixture then exits from the main nozzle and into the venturi. ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM)) There is no metering needle.
     * **The Accelerating Pump System**: The accelerating pump system works with sudden throttle openings (rapid acceleration) to quickly inject fuel into the carb to provide extra fuel for the engine demand. Rapid throttle action pushes the pump rod down, flexing the diaphragm, which compresses fuel underneath the diaphragm, forcing it up past the check valve and out the pump nozzle into the venturi. The check valve prevents backflow while the pump nozzle meters the flow. Spring action then returns the diaphragm back to it's original position. As the diaphragm returns, a new supply of fuel flows in and under it so the system will be ready to repeat the cycle with the next rapid throttle action detected. ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))      * **The Accelerating Pump System**: The accelerating pump system works with sudden throttle openings (rapid acceleration) to quickly inject fuel into the carb to provide extra fuel for the engine demand. Rapid throttle action pushes the pump rod down, flexing the diaphragm, which compresses fuel underneath the diaphragm, forcing it up past the check valve and out the pump nozzle into the venturi. The check valve prevents backflow while the pump nozzle meters the flow. Spring action then returns the diaphragm back to it's original position. As the diaphragm returns, a new supply of fuel flows in and under it so the system will be ready to repeat the cycle with the next rapid throttle action detected. ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM)) 
     * **The Choke System**: The choke is manually set by pulling out on the choke button. Pulled all the way out is fully closed (for cold engine), partially open (for warm engine) or pushed all the way in, fully open (for warm engine). ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))     * **The Choke System**: The choke is manually set by pulling out on the choke button. Pulled all the way out is fully closed (for cold engine), partially open (for warm engine) or pushed all the way in, fully open (for warm engine). ((1970-1978 HD XL/​XLH/​XLCH/​XLT 1000 FSM))
-  * **Additional Tips** on usage: +
-    * Make sure the low speed and main jets are larger than stock to match the more free-flowing aftermarket exhausts and air filters we all seem to run. ((Hopper of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​threadid=659533)) +
-    * Do not run a worn out ignition auto advance unit. It makes carb farts that you would swear were lean low speed mixture.((Hopper of the XLFORUM http://​xlforum.net/​forums/​showthread.php?​threadid=659533)) ​+
   * Integral Float Chamber   * Integral Float Chamber
   * Manual Choke   * Manual Choke
   * 3 different models ​   * 3 different models ​
   * Model Year Changes   * Model Year Changes
-  * **Tuning** 
-  * The usual method to set idle mixture/​speed is: 
-    * First: Set idle MIXTURE screw to 7/8 turns out. Get the bike hot. Set idle at comfortable speed with the idle SPEED screw. ((Hopper http://​xlforum.net/​forums/​showthread.php?​t=276157&​page=2)) 
-    * Second: Adjust the idle MIXTURE screw to the point where engine runs the fastest. This is optimum mixture. ((Hopper http://​xlforum.net/​forums/​showthread.php?​t=276157&​page=2)) 
-    * Third: Adjust idle SPEED screw again to get desired idle speed. ((Hopper http://​xlforum.net/​forums/​showthread.php?​t=276157&​page=2)) 
-  * The spring on the idle speed screw tends to creep the idle speed back up if you try to adjust the idle just that little bit slower. So I adjust the idle speed screw right down too slow, then nudge it up slightly faster until I get the speed I want, then it stays there. ((Hopper http://​xlforum.net/​forums/​showthread.php?​t=276157&​page=2)) 
-  * If your bike idles best with the idle mixture screw less than ½ turn open, you need a smaller low speed fixed jet. ((Hopper http://​xlforum.net/​forums/​showthread.php?​t=276157&​page=2)) 
-  * If your bike idles best with the idle mixture screw more than 1-1/4 turns open, you need a larger low speed fixed jet. 
-  * This is real important. It also is the way to stop “carb farts” – spitting back or backfiring through the carb. 
-    * If your Ironhead has aftermarket free-flow exhaust and airfilter on it, it will almost certainly need a larger low speed fixed jet, and most likely a bigger main jet too. But it is the low speed jet that affects the dreaded carb farts. Main jet affects mixture at wide open throttle and if left lean can overheat the engine, or burn holes in pistons. ((Hopper http://​xlforum.net/​forums/​showthread.php?​t=276157&​page=2)) 
- 
-|{{techtalk:​ih:​carb:​hoppers_77_keihin_carb_pic_1.jpg?​direct&​300|}} |{{techtalk:​ih:​carb:​hoppers_77_keihin_carb_pic_2.jpg?​direct&​300|}} | 
-|1977 Keihin 38mm non-CV pic 1((Hopper from the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=247853))|1977 Keihin 38mm non-CV pic 2((Hopper from the XLFORUM http://​xlforum.net/​forums/​showthread.php?​t=247853))| 
  
 ==== Sportster Keihin Butterfly Carburetors by Year Model ==== ==== Sportster Keihin Butterfly Carburetors by Year Model ====
- +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|||||||| 
-^Sportster Model^Year \\ Carb Used^HD Part Number^Flange \\ Number Main Jet \\ Size  ​^Low Speed \\ Jet Size^Idle Mixture \\ turns open^Accel Pump \\ spring position^ +|Sportster Model|Year \\ Carb Used|HD Part#|Flange ​/ \\ Casting ​\\ Number Main Jet \\ Size  ​|Low Speed \\ Jet Size|Initial ​Mixture \\ screw setting|Accel Pump \\ spring position| 
-|XLH, XLCH|Late 1976|27153-76((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|B50A ((HD Service Bulletin #M-713 dated June 10, 1977))|(140 std) ((HD Service Bulletin #M713 dated June 10, 1977)) \\ Optional jets ((HD Parts and Accessories Bulletin dated February 8, 1977)) ​ \\ - 130, 135, 145, 150 \\ 155, 160, 165, 170, 175((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|100|7/​8 ((HD Service Bulletin #M713 dated June 10, 1977))|Upper ((HD Service Bulletin #M713 dated June 10, 1977))| +|XLH, XLCH|Late 1976|27153-76((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|B50A ((HD Service Bulletin #M-713 dated June 10, 1977))|(140 std) ((HD Service Bulletin #M-713 dated June 10, 1977)) \\ Optional jets ((HD Parts and Accessories Bulletin dated February 8, 1977)) ​ \\ - 130, 135, 145, 150 \\ 155, 160, 165, 170, 175((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|100|7/​8 ((HD Service Bulletin #M713 dated June 10, 1977))|Upper ((HD Service Bulletin #M-713 dated June 10, 1977))| 
-|XLH, XLCH, XLT|1977-1978 |27153-77 ((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|B50B ((HD Service Bulletin #M-713 dated June 10, 1977)) \\ B50C |(160 std) ((1954-1977 HD Sportster Parts Supplement pg 2)) (165 std) ((HD Service Bulletin #M713 dated June 10, 1977)) \\ Optional jets ((HD Parts and Accessories Bulletin dated February 8, 1977)) ​ \\ 130, 135, 145, 150 \\ 155, 160, 165, 170, 175((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|75|1-1/​4 ((HD Service Bulletin #M713 dated June 10, 1977))|Center ((HD Service Bulletin #M713 dated June 10, 1977))| +|XLH, XLCH, XLT|1977-1978 |27153-77 ((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|B50B ((HD Service Bulletin #M-713 dated June 10, 1977)) \\ B50C |(160 std) ((1954-1977 HD Sportster Parts Supplement pg 2)) (165 std) ((HD Service Bulletin #M713 dated June 10, 1977)) \\ Optional jets ((HD Parts and Accessories Bulletin dated February 8, 1977)) ​ \\ 130, 135, 145, \\ 150, 155, 160, \\ 165, 170, 175 ((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|75|1-1/​4 ((HD Service Bulletin #M713 dated June 10, 1977))|Center ((HD Service Bulletin #M713 dated June 10, 1977))| 
-|XL, XLCH, XLS |1979|27469-78A ((1979 Harley Davidson Sportster Parts Catalog))|B83A \\ B83B|165 \\ 160 - above 4000' ((HD Service Buletin #M-730 dated June 15, 1978 - Instruction Sheet pg 2))|65 ((1979 Harley Davidson Sportster Parts Catalog))|  +|XL, XLCH, XLS |1979|27469-78 ((1979 Harley Davidson Sportster Parts Catalog)) \\ 27469-78A ((1980 HD Sportster Parts Catalog -80 pg 17))|B83A \\ B83B|165 \\ 160- \\ above 4000' ((HD Service Buletin #M-730 dated June 15, 1978 - Instruction Sheet pg 2))|65 ((1979 Harley Davidson Sportster Parts Catalog))|  
-|XL, XLS|1980|27469-80A|B83D|160|65 ((1979-1985 HD XL Parts Catalog pg 23))| +|XL, XLS|1980|27469-80 \\ 27469-80A ​((1981 HD Sportster Parts Catalog -81 pg 19))|B83C \\ B83D|160 ​\\ 165|65 ((1979-1985 HD XL Parts Catalog pg 23))| 
-|XL, XLS|1981-Early 1982|27469-81A|B83F|160|68 ((1979-1985 HD XL Parts Catalog pg 25))|+|XL, XLS|E81-E82 \\ L81-E82|27469-81 ((1981 HD Sportster Parts Catalog -81 pg 21)) \\ 27469-81A ​((1983 HD Sportster Parts Catalog -83 pg 23))|B83E \\ B83F|160 \\ 160|68 ((1979-1985 HD XL Parts Catalog pg 25))|
 |XL, XLS|Late 1982|27469-82|B83G|150|68 ((1979-1985 HD XL Parts Catalog pg 25))| |XL, XLS|Late 1982|27469-82|B83G|150|68 ((1979-1985 HD XL Parts Catalog pg 25))|
 |XL, XLS, XLX|E1983|27469-83|B83H|160|52 ((1979-1983 HD XL Parts Catalog pg 23))|  |XL, XLS, XLX|E1983|27469-83|B83H|160|52 ((1979-1983 HD XL Parts Catalog pg 23))| 
Line 272: Line 270:
 |XL 1100|1987|27502-86B ((1986-1987 HD Sportster Parts Catalog pg 21))|B83H|150|52| |XL 1100|1987|27502-86B ((1986-1987 HD Sportster Parts Catalog pg 21))|B83H|150|52|
  
-^  Main Jets ((1954-1976 HD Sportster Parts Catalog pg 19)) ((TSB #694 dated November 7, 1975))  ​^^^^^^^ +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|||||||| 
-|HD#​|27397-76|27398-76|27399-76|27615-76|27400-76|27401-76| + Main Jets ((1954-1976 HD Sportster Parts Catalog pg 19)) ((TSB #694 dated November 7, 1975))  ​|||||||| 
-|Size|155 \\ 1001-104-155|150 \\ 1001-104-150|145 \\ 1001-104-145|140 \\ 1001-104-140|135 \\ 1001-104-135|130 \\ 1001-104-130| +|HD#​|27397-76|27398-76|27399-76|27615-76|27400-76|27401-76|
-^ ^^^^^^^ +|Size|155 \\ 1001-104-155|150 \\ 1001-104-150|145 \\ 1001-104-145|140 \\ 1001-104-140|135 \\ 1001-104-135|130 \\ 1001-104-130|
-|HD#​|27356-76|27416-76|27417-76|27418-76|27419-76|27420-76| +||||||||| 
-|Size|185|180|175|170|165|160|+|HD#​|27356-76|27416-76|27417-76|27418-76|27419-76|27420-76|
 +|Size|185|180|175|170|165|160||
  
 ==== Other HD Keihin Carburetors by Year Model ==== ==== Other HD Keihin Carburetors by Year Model ====
- +^{{techtalk:​miscres:​instruction_sheet_header_4.png?​nolink&​850|}}|||||||| 
-^Other HD Model^Year \\ Carb Used^Serial Number^Flange \\ Number Main Jet \\ Size  ​^Low Speed \\ Jet Size^Idle Mixture \\ turns open^Accel Pump \\ spring position^ +|Other HD Model|Year \\ Carb Used|Serial Number|Flange ​/ \\ Casting ​\\ Number Main Jet \\ Size  ​|Low Speed \\ Jet Size|Initial ​Mixture \\ screw setting|Accel Pump \\ spring position| 
-|All FX|76|27155-76| 860A ((Hd TSB #M713 dated June 10, 1977)) \\ 860B |185 ((Hd TSB #M713 dated June 10, 1977))|100|7/​8|center|+|All FX|76|27155-76| 860A ((Hd TSB #M-713 dated June 10, 1977)) \\ 860B |185 ((Hd TSB #M713 dated June 10, 1977))|100|7/​8|center|
 |All FL|76-E77|:::​|:::​|:::​|:::​|:::​|:::​| |All FL|76-E77|:::​|:::​|:::​|:::​|:::​|:::​|
 +|The (860B) had the longer 59.5mm accelerator pump rod. ((1966-1984 HD FL Parts Catalog (99456-84B) pg 33))||||||||
 |All FX \\ All FL|L77-E78|27155-76A ((1941-1978 Hd Electra Glide, Super Glide Parts Catalog pg 17))| 860C ((Hd TSB #M713 dated June 10, 1977)) \\ 860D |175 ((Hd TSB #M713 dated June 10, 1977))|88|1-1/​2|center| |All FX \\ All FL|L77-E78|27155-76A ((1941-1978 Hd Electra Glide, Super Glide Parts Catalog pg 17))| 860C ((Hd TSB #M713 dated June 10, 1977)) \\ 860D |175 ((Hd TSB #M713 dated June 10, 1977))|88|1-1/​2|center|
 |:::​|:::​|:::​|:::​|:::​|:::​|:::​|:::​| |:::​|:::​|:::​|:::​|:::​|:::​|:::​|:::​|
 |FX, FXE, FXS|L1978-1979|27468-78A ((1971-1984 HD FX Parts Catalog pg 27))|B81B|160|72| |FX, FXE, FXS|L1978-1979|27468-78A ((1971-1984 HD FX Parts Catalog pg 27))|B81B|160|72|
 +|FLH-80 \\ Classic|L1978-1979|27466-78A ((1966-1984 HD FL Parts Catalog ​ (99456-84B) pg 33))|B78B|165|70|
 +|FL, FLH|L1978-1979|27467-78A ((1966-1984 HD FL Parts Catalog pg  (99456-84B) 33))|B80B|165|70|
 +|FXS-80 \\ FXEF-80|1979|27472-79 ((1971-1984 HD FX Parts Catalog pg 27))|B79A|160|72|
 |FXEF|1979|27466-78A ((1971-1984 HD FX Parts Catalog pg 27))|B78A|160|72| |FXEF|1979|27466-78A ((1971-1984 HD FX Parts Catalog pg 27))|B78A|160|72|
-|FXS \\ FXEF-80|1979|27472-79 ((1971-1984 HD FX Parts Catalog pg 27))|B79A|160|72+|?​|1980|27467-80| ​ |  |  | 
-|?|?|27467-80|  ​| ​  |+|FLH-80 ​\\ Classic \\ Sidecar (79-80)|1980|27466-80A ((1966-1984 HD FL Parts Catalog pg  ​(99456-84B) 33))|B78D|165|68
 +|FL, FLH|1980|27467-80A ((1966-1984 HD FL Parts Catalog pg  (99456-84B) 33))|B80D|165|68|
 |FXE, FXEF, FXS|1980|27468-80A ((1971-1984 HD FX Parts Catalog pg 27))|B81D|160|72| |FXE, FXEF, FXS|1980|27468-80A ((1971-1984 HD FX Parts Catalog pg 27))|B81D|160|72|
 |FXWG|1980|27470-80 ((1971-1984 HD FX Parts Catalog pg 27))|B28D|160|72| |FXWG|1980|27470-80 ((1971-1984 HD FX Parts Catalog pg 27))|B28D|160|72|
 |FXS-80 \\ FXEF-80 \\ FXB|1980|27472-80A ((1971-1984 HD FX Parts Catalog pg 27))|B79D|160| |FXS-80 \\ FXEF-80 \\ FXB|1980|27472-80A ((1971-1984 HD FX Parts Catalog pg 27))|B79D|160|
 +|  |1981 ?​|27494-81|B78E|
 +|FLH-80 \\ Classic|1981-1984|27494-81A ((1966-1984 HD FL Parts Catalog pg  (99456-84B) 33))|B78F|165|70|
 |FXEF-80 \\ FXE-80|1981-1983|27472-81A ((1971-1984 HD FX Parts Catalog pg 29))|B79F|160 (FXEF-80) \\ 165 (FXE-80)|72| |FXEF-80 \\ FXE-80|1981-1983|27472-81A ((1971-1984 HD FX Parts Catalog pg 29))|B79F|160 (FXEF-80) \\ 165 (FXE-80)|72|
 |FXS-80, FXB \\ FXWG, FXSB|1981-1983|27470-81A ((1971-1984 HD FX Parts Catalog pg 29))|B28H|160 \\ all FX models \\ (except FXE-80)|72| ​ |  | |FXS-80, FXB \\ FXWG, FXSB|1981-1983|27470-81A ((1971-1984 HD FX Parts Catalog pg 29))|B28H|160 \\ all FX models \\ (except FXE-80)|72| ​ |  |
-|All FX models|1984|:::​|:::​|:::​|:::​|:::​|:::​|+|FX models|1984|:::​|:::​|:::​|:::​|:::​|:::​
 +|?​|?​|27469-83B|B83K| 
 +|FXST|1984|27029-83D|02BL|160|50| 
 +|FX models|1985|27499-85 \\ 41mm|99BA|165|52|
 |?​|?​|?​|02BP| ​ |  | |?​|?​|?​|02BP| ​ |  |
-|?|?|?|02BQ| ​  |+|FX models|1986|27029-86B|02BQ|170|50|
 |All FXR, SOFTAIL|1987|27029-86B ((87-89 FLT-FXR-Softail Parts Catalog-Carb Info))|02BR|165|50| |All FXR, SOFTAIL|1987|27029-86B ((87-89 FLT-FXR-Softail Parts Catalog-Carb Info))|02BR|165|50|
 |All FLT|1987|27034-86B ((87-89 FLT-FXR-Softail Parts Catalog-Carb Info))|B88R|170|50| |All FLT|1987|27034-86B ((87-89 FLT-FXR-Softail Parts Catalog-Carb Info))|B88R|170|50|
Line 303: Line 312:
 |All FLT, \\ FXR, SOFTAIL \\ (Cal. and Swiss only)|1988-1989|27026-88A ((87-89 FLT-FXR-Softail Parts Catalog-Carb Info))|F59B|140|42| |All FLT, \\ FXR, SOFTAIL \\ (Cal. and Swiss only)|1988-1989|27026-88A ((87-89 FLT-FXR-Softail Parts Catalog-Carb Info))|F59B|140|42|
  
-  * Carburetors with the latest letter stamped on the flange ​have improved sealing on the welch plugs, throttle shaft ends and idle mixture screw. ((HD Service Bulletin #M713 dated June 10, 1977))+  ​* HD part numbers are on a sticker on top of the carb on the choke cable side. Over the years, they may be not readable or may be missing. \\ Refer to the flange or ID casting numbers for specific engines used on. 
 +  * 76-78 model numbers are in the side flange near the manifold. 
 +  * 79-up model numbers are on the lower right side ID casting block. 
 +  ​* Carburetors with the latest letter stamped on the flange ​had improved sealing on the welch plugs, throttle shaft ends and idle mixture screw. ((HD Service Bulletin #M713 dated June 10, 1977))
   * Carb Idle Speed: 900 RPM ((Clymer Sportster Repair Manual 1959-1985))   * Carb Idle Speed: 900 RPM ((Clymer Sportster Repair Manual 1959-1985))
   * Torque Specs:​((1970-2010 Haynes Sportster Service and Repair Manual pgs 3.1-3.2)) Late 1976-1985, Carburetor Mounting Nuts - 19 ft/lbs (26 Nm)   * Torque Specs:​((1970-2010 Haynes Sportster Service and Repair Manual pgs 3.1-3.2)) Late 1976-1985, Carburetor Mounting Nuts - 19 ft/lbs (26 Nm)
   * The original idle mixture setting for E76 Keihin carbs was 1-1/2 turns out and adjust from there. ((TSB #694 dated November 7, 1975)) \\ In December of 1976, that was changed to 7-8 turns out for FL and FX models. ((HD TSB #M-707 dated December 1, 1976)) \\ In June of 1977, L77-up FL and FX models were changed back to 1-1/2 turns out with earlier models remaining at 7/8 turns.   * The original idle mixture setting for E76 Keihin carbs was 1-1/2 turns out and adjust from there. ((TSB #694 dated November 7, 1975)) \\ In December of 1976, that was changed to 7-8 turns out for FL and FX models. ((HD TSB #M-707 dated December 1, 1976)) \\ In June of 1977, L77-up FL and FX models were changed back to 1-1/2 turns out with earlier models remaining at 7/8 turns.
  
-===== Swapping to a Keihin CV Carb =====+====== Boiling Gas ====== 
 +Gas getting to the boiling point can happen for several reasons. \\ 
 +Having the gas line resting against the engine, the float set too low and others will also attribute to boiling gas. \\ 
 +The problem from hot gas is a vapor lock if the gasoline is heated to the point where it vaporizes before it reaches the intake. ((KWJams of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72243-boiling-gasoline?​t=496913)) \\ 
 + 
 +**A lean bike will run hot**: \\ 
 +Make sure the intake seals really well and make sure they'​re not leaking. ((FourCams of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72243-boiling-gasoline?​t=496913)) \\  
 + 
 +**Engine heat transferring thru the carb**: \\ 
 +On BTs, an erratic idle condition can happen due to fuel vaporization in slow moving traffic or at high ambient temperatures. \\ 
 +The engine temperature may rise to the point where it heats the carburetor enough to boil the fuel. \\ 
 +When this happens, the engine can idle erratically and stop. \\ 
 + 
 +You may be able to look inside your gas tank after the bike has been sitting for about 15 minutes and see gas boil inside the tank. ((MDT of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72243-boiling-gasoline?​t=496913)) \\ 
 +While your engine is running, the air going through the carb, cools the carb. \\ 
 +But when you shut off the engine, the heat from your heads and cylinders transfers into your carb. With nothing to cool your carb, you can hear your vent gurgling. \\ 
 +If your carb vent is plugged, it can push gas from your bowl through your main jet, right into your intake. 
 +You can get fiber insulators that will help lower the heat transfer to your carb. \\ 
 +The fix is to install a phenolic spacer between the carb and the manifold. \\ 
 +See [[techtalk:​ih:​carb01#​heat_spacer_insulator_block|Heat Spacer/​Insulator Block]] below. \\ 
 + 
 +**Fuel line touching the engine**: \\ 
 +Fuel line routing options are limited by the design. Keep the fuel line away from touching the cylinders/​heads. \\ 
 +The air flow between them should be adequate to keep the fuel cool as long as the fuel line is not touching a heat source. \\ 
 +   
 +Below, a fuel boiling problem was found in a 77 XLCH by XLF member, gemeinschaft. \\ 
 +<​blockquote>​I went for a ride yesterday, it was great. Then, I smelled gasoline. I noticed gas coming out of the carb after I stopped. ((gemeinschaft of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72243-boiling-gasoline/​page3?​t=496913&​page=3)) \\ 
 +I double checked and yes, the petcock was turned off. I looked at the fuel filter and there were bubbles as the gasoline was at a rolling boil (in the clear tube fuel filter). \\ 
 +I backed off and waited for a while and pretty soon it all evaporated. \\ 
 +My petcock is on the left side and it runs down by the horn in between the two cylinders. (Talk about a heat source). \\ 
 +The fuel line literally touches the fins of the rear cylinder and then goes back up to the carb. \\ </​blockquote>​ 
 + 
 +|  This fuel line is in the lower "​V"​ and touching the cylinders. Bubbles were found in the filter. ((photos by gemeinschaft of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​72243-boiling-gasoline/​page3?​t=496913&​page=3)) ​  || 
 +|{{:​techtalk:​ih:​carb:​boiling_gas_1_by_gemeinschaft.jpg?​direct&​300|}}|{{:​techtalk:​ih:​carb:​boiling_gas_2_by_gemeinschaft.jpg?​direct&​300|}}| 
 + 
 +**Possible fixes to keep the fuel line away from the engine**: \\ 
 +  * You can route the line so it avoids the heads and cylinders as best you can. ((Moon Wolf of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93180-heat-shield-for-your-fuel-line?​t=766794)) \\ You can use a longer or shorter line to allow you some flexibility in routing. \\ You want a steady downward slope from the petcock to the carb eunning gravity type petcocks. 
 +  * Use fuel line with braided stainless-steel sheathing to protect the rubber hose from heat. \\ If your fuel hose melts and spills gas onto the motor, you won't soon forget it. 
 +  * Slip a length of coiled wire (or a spring) over the braided fuel line where it goes between the jugs. \\ This has been done on everything from hot rods to airplanes for longer than anyone can remember. 
 +  * You can take the spiral wire from a paper notebook and stretch it some and run the fuel line through it. \\ You just want to keep it from touching the cylinders/​heads. ((jharback of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93180-heat-shield-for-your-fuel-line?​t=766794)) 
 +  * Use clothes pins on the fuel line to create some space for the line. 
 + 
 +|  Clothes pins attached to fuel line for separation. ((photo by JonesL of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​200399-bendix-insulator-block#​post4425181)) ​ | 
 +|{{:​techtalk:​ih:​carb:​clothes_pin_separation_for_gas_hose_by_jonesl.jpg?​direct&​300|}}| 
 + 
 +====== Heat Spacer / Insulator Block ====== 
 + 
 +**The insulating block was not known to be suggested for use on Sportster Bendix or Keihin butterfly carbs by the MoCo**. \\ 
 +In December of 1976, insulating block (27412-57) was suggested to use on 76 and later FL and FX models (one block on FX and two blocks on FL models). ((HD TSB #M-707 dated December 1, 1976)) \\ 
 +This was suggested to eliminate erratic idle due to fuel vaporization in slow moving traffic or at high ambient temperatures. \\ 
 +The engine temperature may rise to the point where it heats the carburetor enough to boil the fuel. \\ 
 +When this happens, the engine can idle erratically and stop. To prevent this, place the insulating block(s) between the engine and carburetor. \\ 
 +[[techtalk:​miscres:​miscres05#​tsb_700-749|Click here to view the TSB page in the Sportsterpedia]]. Click on the "​Y"​ next to M-707 to view download the PDF. \\ 
 + 
 +In August of 1977, a Service Bulletin was issued regarding the use of a new spacer block (29250-78A) on 1977→ 1200CC engines. ((HD TSB #M-715 dated August 12, 1977)) \\ 
 +The bulletin addresses proper installation for better sealing of the carb to A/C and carb/​insulator block/​manifold seal. \\ 
 +[[techtalk:​miscres:​miscres05#​tsb_700-749|Click here to view the TSB page in the Sportsterpedia]]. Click on the "​Y"​ next to M-715 to view download the PDF. \\ 
 +This kit was also suggested for installation of the spacer block. \\ 
 +|PART #​|DESCRIPTION|QUANTITY|REPLACES| 
 +|7739|LOCK NUT \\ 5/​16"​-18 x 11/32" X 1/2" Hex|  2  |  7725  | 
 +|5895|INSULATING SPACER| ​ 1  |  -  | 
 +|24820-78|STUD \\ 5/​16"​-18 x 5/​16-18| ​ 2  |  24818-52 ​ | 
 +|27077-78|GASKET| ​ 2  |  -  | 
 + 
 +In April of 1984, a Service Bulletin was issued a gasket (27023-71) was added between the carb and insulator block on 1340cc engines assembled in February, 1984. \\ 
 +On earlier 1340'​s,​ if an air leak was found or suspected between the carburetor and insulator block, the gasket was to be installed. \\ 
 +[[techtalk:​miscres:​miscres05#​tsb_700-749|Click here to view the TSB page in the Sportsterpedia]]. Click on the "​Y"​ next to M-888 to view download the PDF. \\ 
 + 
 +Some Sportster owners say they have never needed them and others use them regularly. \\ 
 +**Argument for using the spacer**: \\ 
 +((photo by Robicycle of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​155008-weird-keihin-carb-problem?​t=1663198&​highlight=keihin+bowl)) ((photo by Hopper of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​55576-how-to-tune-keihin-carbs-links/​page3?​t=276157&​page=3)) {{ :​techtalk:​ih:​carb:​keihin_butterfly_carb_6_by_hopper.jpg?​direct&​300|}} \\ {{ :​techtalk:​ih:​carb:​keihin_butterfly_carb_4_by_robicycle.jpg?​direct&​300|}} \\ 
 +The Phenolic fiber spacer helps with hot idle or starting problems. One infuriatingly simple thing that affects idle, starting and carb farts when your engine is hot, is this phenolic fiber spacer. ((Hopper of the XLFORUM https://​www.xlforum.net/​forum/​sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​55576-how-to-tune-keihin-carbs-links/​page3?​t=276157&​page=3)) It's between the carb and manifold, which some models had and others did not. It stops engine heat from flowing into the carb. If your model doesn'​t have one of these stock, you can cut one out of a sheet of fiber about 3/16" thick. JP Cycles or others sell one that is a bit thicker and might work even better. There should be a gasket on each side of the spacer while still using the rubber O-ring on the carb flange. Of course, make sure both the carb flange and the manifold are filed nice and flat with a 10-inch flat file first. Without it, your carb can get too hot to touch within minutes of the bike being parked with a hot engine. Even the air filter gets hot. There is a lot of heat flowing from the heads, up the manifold and into the carb which makes it hard to start and idle rough. The heat vaporizes the fuel in the float bowl and it can boil and come out the overflow tube at the bottom of the float bowl. This also means the tiny amount of fuel trying to go through the idle adjuster screw and into the carb throat can also vaporize. Fuel going into the engine needs to be tiny globules of liquid fuel, not vapor. Putting a heat-blocking spacer on is really worth the effort if you ride a lot in city traffic. (where idling at the lights will allow heat to flow into the carb while there is no cooling wind) With a kick only XLCH, the easier hot starting is a Godsend. \\ 
 + 
 +**Here are some part numbers for the different insulator blocks used on 4 stroke Harleys**. \\ 
 +There is no known insulator block that was factory installed on a Bendix Carb as used on Sportsters. \\ 
 + 
 +  * 27412-57 for 57-65 XL FL, FX. (Linkert) 
 +  * 27015-66 for XLH 66-71.XLCH '​66;​70-71 (Tillotson) 
 +  * 27012-67 (has 1 longer stud) 66-69 XLCH67-70 BTs (Tillotson) 
 +  * 29250-78 for 76-89 BTs (Keihin butterfly) 
 +  * 29250-78A for 78-E84 FL,FLH and Late 78-E84 FLT and 80-85 FXR (Keihin butterfly) 
 +  * 27003-86 for 86-87 XL (Keihin butterfly) 
 +  * 27003-86A for 86-87 XL (Keihin butterfly) 
 +  * 29266-86 plastic, for 86-87 XL (Keihin butterfly). 
 + 
 +====== Swapping to a Keihin CV Carb ======
 See [[techtalk:​ref:​carb09|Ironhead - Installing a Keihin CV Carb]] in the REF section of the Sportsterpedia. \\ See [[techtalk:​ref:​carb09|Ironhead - Installing a Keihin CV Carb]] in the REF section of the Sportsterpedia. \\