Differences

This shows you the differences between two versions of the page.

--- techtalk:evo:carb01 [2020/05/17 20:41]
ixl2relax
+++ techtalk:evo:carb01 [2024/01/02 18:43] (current)
hippysmack
@@ Line 2: / Line 2: @@
 ====== EVO: Carburetor, Intake Manifold & Exhaust ======
-====== Overview ======
+====== Overview - Basic Stock Carb Model Info ======
 From 1986-1987, the stock Sportster carburetor was a Keihin 34mm, fixed-venturi "butterfly" model, as used on the Ironhead models from 1979 onward (BT models still used the 38mm version). Contrary to popular folklore, all Keihin non-CV carbs did come with accelerator pumps.
@@ Line 14: / Line 14: @@
 ====== Keihin Butterfly (non-CV) Carburetor (Stock on L1976-1987 Sportsters) ======
+See also in the Sportsterpedia: \\
+  * [[techtalk:ih:carb01#keihin_butterfly_or_non-cv_carb_late_1976-1987|Keihin Butterfly Carb Basic Information]]
+  * [[techtalk:ih:carb01q|Rebuilding the Keihin Butterfly Carb]]
+  * [[techtalk:ih:carb01p|Keihin Butterfly Carb Identificaton]]
+  * [[techtalk:miscres:miscres05#tsb_650-699|See TSB #694 for introduction information on the Keihin butterfly carb]]. \\ Click the link to view the TSB page in the Sportsterpedia. Then click on the "Y" next to #694 to view / download the PDF. \\
   * The Keihin non-CV carburetor is a horizontal type with a fuel bowl, single ring-shaped float, an accelerating pump, idle mixture adjusting needle and a throttle stop screw for speed adjustment. ((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM))
   * The throttle body casting contains an integral venturi and a fuel valve seat that is pressed into the body. The underside of the throttle body contains a boss. The main jet screws into the boss and holds the bleed tube in place.((1970-1978 HD XL/XLH/XLCH/XLT 1000 FSM))
@@ Line 41: / Line 47: @@
   * VOES port
   * Evaporative port \\ **Note**: \\ For those sold for use in California (as part of the evaporative emissions kit) the fuel overflow fitting was capped and the overflow line was removed. ((HD Service Bulletin #M-905 dated August 26, 1985))
 ===== Factory Keihin Butterfly (non-CV) 34mm Carb by Sportster Model/Year =====
@@ Line 58: / Line 62: @@
   * Slow Jet
     * 27329-83 - .52mm
 |Carb Idle Speed| 900 RPM ((Clymer Sportster Repair Manual 1959-1985))||
@@ Line 69: / Line 72: @@
-Interesting discussion here: http://xlforum.net/forums/showthread.php?t=1847273
+Interesting discussion here: https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/172520-stock-carb-size-on-1100-sportster?t=1847273
 \\
@@ Line 85: / Line 88: @@
 //
   * Used in the Screaming Eagle Package line from HD as an Evolution XLH HI-FLO Carburetor & Air Cleaner. The carb was a (27001-88)
-  * The kit Number is 29081-90C for 86 and later Sportsters.
+  * The kit Number is 29081-90C for 86 and later Sportsters. Carb stamping is (27FA) plus a 4 character date code.
   * Adjustable Accelerator Pump stroke
   * Incorporated a special intake manifold to carb spacer that had to be drilled and tapped (1/4 x 28) in the side for included Voes connection adapter
   * Required a 1987 replacement style intake manifold for 1988 and up models
-  * Required possible grinding of the right rear corner of the front cylinder head, due to interference with the carburetor throttle pulley and cable guides, for proper clearance  ((http://xlforum.net/forums/showthread.php?t=132922))
+  * Required possible grinding of the right rear corner of the front cylinder head, due to interference with the carburetor throttle pulley and cable guides, for proper clearance  ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/43694-keihin-carb-diagram-and-settings?t=132922))
+  * Build kits and the bowl gasket are obsolete and hard to find.
+    * The bowl gasket (27013-85) has been found at JW Boon.com but not the build kit. \\ [[https://jwboon.com/index2.php?content=https%3A//jwboon.com/dbhtml/catalog/Bool_OR/Fits_FLT%2520%2522Tour%2520Glide%2522/Section_inlet|Click here for a Link to their add]]. However, they do not ship to the U.S.
+    * Dennis Kirk sells a kit that looks to have the correct bowl O-ring included under Parts Unlimited branding.  Kit (1003-1671). \\ [[https://www.denniskirk.com/parts-unlimited/carb-rebuild-kit-1003-1671.p175288.prd/175288.sku|Click here for the link]]. However, according to the Q&A at the bottom of the page, the O-ring doesn't fit the SE carb. That needs to be verified.
+    * Parts Unlimited shows kit# 175288 (1003-1671) as a replacement for the stock paper gasket on Yamahas, still a Keihin though and the gasket (O-ring) looks the same. \\ [[https://www.parts-unlimited.com/prod...umber=10031671|Click for the link]]
+    * Speed Supplies.com has a listing for the bowl O-ring (27013-85) although there is no pic of it. ((LenC of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/199949-can-t-find-a-bowl-gasket-anywhere-options/page3?t=2076892&page=3)) \\ [[http://www.speedsupplies.com/partslisting.asp?position=312&increment=500&category=HD|Click here for the link]]
-^  PART NUMBERS & JET SIZES (IN MM) FOR KEIHIN BD CARBURETORS  ^^^^^^^^
+^  JET PART NUMBERS & SIZES (IN MM) FOR KEIHIN BD CARBURETORS  ^^^^^^^^
 ^Slow Jet  ^Size | ^Int. Air/Fuel Jet ^Size  | ^Main Jet ^Size  |
 |27383-88 |42 | |27113-87 |Blank* | |27106-85 |1.30 |
@@ Line 105: / Line 114: @@
 |27897-78 |72 | | || | ||
 |              * in carburetor               ||||||||
- ((http://xlforum.net/forums/showthread.php?t=132922))
+ ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/43694-keihin-carb-diagram-and-settings?t=132922))
+\\
+^  XLH Hi-Flo Carburetor and Air Cleaner Kit (29081-90C) Parts List  ||||||
+|Item Description|Part No.|Item Description|Part No.|Item Description|Part No.|
+|VOES fitting|29190-85|Backplate|29075-91|Crankcase breather hose fitting|29034-85|
+|Gasket|27022-88|Button head screw|927A|O-ring|11110|
+|Manifold spacer|29275-88|Support spacer, \\ small I.D.|6786|Hose clamp|9946|
+|Carburetor assembly|27001-88|Support spacer, \\ large I.D.|6785|Venturi|29148-90|
+|Allen head bolts|3485A|Hex head bolt|3427|Air cleaner element|29025-88B|
+|Washer|6702|Allen head bolt|3587A|Vacuum hose kit|26553-94|
+|Lockwasher|7041|Washer|6333|Air cleaner trim|29024-88|
+|Air cleaner adapter|27041-90|Washer|6738|Bowl O-ring|27013-85|
+|Allen head bolt|885A|Gasket|27077-78|Rebuild Kit|91731-85A \\ See [[techtalk:miscres:miscres05#tsb_950-999|TSB M-961]]|
+|Nut|7686|Lockwasher|7068|
+|Washer|6228W|Air cleaner cover spacer|31523-88|
+|Carburetor gasket|27044-90|Counter-sunk allen head screw|3795|
 {{:techtalk:evo:carb:se_carb_functions.jpg?direct&300|}}
-{{:techtalk:evo:carb:se_high_flow_carb_1_by_88hugger.jpg?direct&300|}} ((photo by 88hugger of the XLFORUM http://xlforum.net/forums/showthread.php?p=1906502#post1906502))  {{:techtalk:evo:carb:se_high_flow_carb_2_by_88hugger.jpg?direct&300|}} ((photo by 88hugger of the XLFORUM http://xlforum.net/forums/showthread.php?p=1906502#post1906502)) \\
+{{:techtalk:evo:carb:se_high_flow_carb_1_by_88hugger.jpg?direct&300|}} ((photo by 88hugger 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/72194-carb-questions#post1906502))  {{:techtalk:evo:carb:se_high_flow_carb_2_by_88hugger.jpg?direct&300|}} ((photo by 88hugger 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/72194-carb-questions#post1906502)) \\
 \\
@@ Line 130: / Line 154: @@
   * Constant velocity, gravity fed - has a float-operated inlet valve and a vacuum-operated variable venturi (movable slide).
-  * Both the CV40 and CVK carbs are made by Keihin in Japan. But only the CV is specific to a Harley and has the bar and shield and HD name on the side. ((CVPerformance of the XLFORUM http://xlforum.net/forums/showthread.php?t=1729649&page=2)) \\ CVK is for Kawasaki and various other makes that contracted Keihin for that carburetor. \\ There is also a CV40 making the rounds that is distributed by a Florida company that looks identical but not all the specs match up. \\ There is no guarantee that any part (original or CVP) will fit those knock-off carburetors. \\ If your CV carb does not have the name Harley Davidson cast above the bowl on each side it is a knock-off.
+  * Both the CV40 and CVK carbs are made by Keihin in Japan. But only the CV is specific to a Harley and has the bar and shield and HD name on the side. ((CVPerformance of the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/frame-mount-evo-sportster-talk-1986-2003-models/161092-accelerator-pump-diaphragm-wrong-size/page2?t=1729649&page=2)) \\ CVK is for Kawasaki and various other makes that contracted Keihin for that carburetor. \\ There is also a CV40 making the rounds that is distributed by a Florida company that looks identical but not all the specs match up. \\ There is no guarantee that any part (original or CVP) will fit those knock-off carburetors. \\ If your CV carb does not have the name Harley Davidson cast above the bowl on each side it is a knock-off.
 ^Torque Specs ^^^
@@ Line 138: / Line 162: @@
 == Operation: ==
-  *  The carburetor atomizes gas in proper proportions to the air  pulled in through the air intake. At idle, a small amount of gas is siphoned through the pilot jet by the incoming air. The more the throttle is opened, the air begins siphoning through the main and needle jets. The tapered needle increases the flow of the needle jet as it is lifted since it's taper gets smaller as it sets inside the needle jet thus allowing for more flow when lifted up and out. Vacuum from carbs intake,the engine side of the throttle plate, is used to lift the slide barrel/ needle jet. At full throttle, the carburetor venturi is fully opened and the needle is lifted far enough to allow the main jet to flow at full jet capacity. The choke circuit is actually the starting enrichment valve system. The choke knob opens an enrichment valve. With the choke knob in the open position, the slow jet sends a stream of gas into the carburetor's venture thus enriching the gas/air mixture when the engine is cold. The accelerator pump circuit injects a fine spray of gas into the carburetor intake during sudden acceleration to reduce engine hesitation.
+  *  The carburetor atomizes gas in proper proportions to the air pulled in through the air intake. The throttle plate controls the amount of air flow. At idle, a small amount of gas is siphoned through the pilot jet by the incoming air and fed thru the Idle Port on the engine side of the throttle plate. As the throttle plate is opened farther, the air begins siphoning gas through the transfer ports (which are fed by the Pilot Jet) and eventually pulls gas thru the needle jet (which is fed by the main jet). The tapered needle, which moves up and down thru the fixed diameter needle jet, increases the flow of fuel as it is lifted up since it's taper gets smaller inside the needle jet, thus allowing for more flow when lifted up and out. The vacuum, in the air filter side of the throttle plate, is used to lift the slide barrel & needle jet. At full throttle, the carburetor venturi is fully opened and the needle is lifted far enough to allow the main jet to flow at full jet capacity. The choke circuit is actually an enrichment valve system to allow more fuel at startup. With the choke knob pulled out, a separate jet opening sends a stream of gas into the carburetor's venturi, on the engine side of the throttle plate, thus enriching the gas/air mixture when the engine is cold. The accelerator pump circuit injects a fine spray of gas into the carburetor intake during sudden twisting of the throttle to aid acceleration & reduce engine hesitation.
 ----
@@ Line 145: / Line 169: @@
 ===== Factory Keihin CV40 Carburetors by Sportster Model/Year =====
 ===== Emissions Observations =====
-by Almond farmer: ((http://xlforum.net/forums/showthread.php?postid=5567479#post5567479))
+by Almond farmer: ((https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-era-specific-and-model-specific/ironhead-sportster-motorcycle-talk-1957-1985/85814-best-carb-for-your-ironhead/page10?postid=5567479#post4106580))
@@ Line 168: / Line 192: @@
   * Unfortunately, CV could satisfy tier 2 emissions at only .8 g/km.
+ \\
-\\
 ===== U S A (Domestic) Sportster Models =====
@@ Line 199: / Line 217: @@
-^Sportster Model^Year^ Keihin CV 40mm \\ Carb Serial # ^ Main / Slow \\ Jet Size ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))^  Main / Slow Jet \\ (Part #s)  ^ Keihin Needle \\ for Vac Slide((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) ^
+^Sportster Model^Year^ Keihin CV 40mm \\ Carb Serial # ^ Main / Slow \\ Jet Size ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))^  Main / Slow Jet \\ (Part #s)  ^ Keihin Needle \\ for Vac Slide((Cross-reference numbers by Folkie  from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) ^
 |**XL883** (Dom)|1988|27501-88 \\ No Accel Pump|170 / 35|(27115-88) - (27117-88)|N65A (27091-88)|
 |            |1989-1990|27501-89|175 / 45|(27090-89) - (27170-89)|N72A (27166-89)|
@@ Line 262: / Line 280: @@
 |             |1999-2001|27731-98|195 / 42|(27275-96Y) - (27171-89)|(27656-98)|
 |             |2002-2003|27731-98A|195 / 42|(27275-96Y) - (27171-89)|(27656-98)|
 ===== U S A (California) Sportster Models =====
@@ Line 288: / Line 304: @@
-^Sportster Model^Year^ Keihin CV 40mm \\ Carb Serial # ^ Main / Slow \\ Jet Size ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))^  Main / Slow Jet \\ (Part #s)  ^ Keihin Needle \\ for Vac Slide((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) ^
+^Sportster Model^Year^ Keihin CV 40mm \\ Carb Serial # ^ Main / Slow \\ Jet Size ((Cross-reference numbers by Folkie  from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7))^  Main / Slow Jet \\ (Part #s)  ^ Keihin Needle \\ for Vac Slide((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) ^
 |**XL883** (Cal)|1988|27504-88 \\ No Accel Pump|165 / 35|(27116-88) - (27117-88)|N65B (27092-88)|
-|           |1989|27504-88A|<wrap hi><del>?</del></wrap> / 42 \\ 155 / 42 ((1886-1990 HD Sportster FSM pg 4-1))| <wrap hi>(<del>27154-88</del>)</wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27154-89)((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) - (27171-89)|N72B (27167-89)|
+|           |1989|27504-88A|<wrap hi><del>?</del></wrap> / 42 \\ 155 / 42 ((1886-1990 HD Sportster FSM pg 4-1))| <wrap hi>(<del>27154-88</del>)</wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27154-89)((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) - (27171-89)|N72B (27167-89)|
-|           |1990|27503-88A|<wrap hi><del>?</del></wrap> / 42 \\ 160 / 42 ((1886-1990 HD Sportster FSM pg 4-1))|<wrap hi><del>(27152-88)</del></wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27152-89)((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) - (27171-89)|N72F (27169-89)|
+|           |1990|27503-88A|<wrap hi><del>?</del></wrap> / 42 \\ 160 / 42 ((1886-1990 HD Sportster FSM pg 4-1))|<wrap hi><del>(27152-88)</del></wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27152-89)((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) - (27171-89)|N72F (27169-89)|
 |           |1991|27503-88B|160 / 42|(27152-89) - (27171-89)|N72F (27169-89)|
 |           |1992- Early 1993|27488-92|160 / 40|(27152-89) - (27281-92)|N86Q (27183-92)|
@@ Line 308: / Line 324: @@
 |           |2005-2006|27495-04|180 / 42|(27114-88) - (27171-89)|N4NN (28026-04)|
 |**XL883 Hug** (Cal)|1988|27504-88 \\ No Accel Pump|165 / 35|(27116-88) - (27117-88)|N65B (27092-88)|
-|           |1989|27504-88A|<wrap hi><del>?</del></wrap> / 42 \\ 155 / 42 ((1886-1990 HD Sportster FSM pg 4-1))| <wrap hi>(<del>27154-88</del>)</wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27154-89)((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) - (27171-89)|N72B (27167-89)|
+|           |1989|27504-88A|<wrap hi><del>?</del></wrap> / 42 \\ 155 / 42 ((1886-1990 HD Sportster FSM pg 4-1))| <wrap hi>(<del>27154-88</del>)</wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27154-89)((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) - (27171-89)|N72B (27167-89)|
 |           |1990|27503-88A|<wrap hi><del>?</del></wrap> / 42 \\ 160 / 42 ((1886-1990 HD Sportster FSM pg 4-1))|<wrap hi><del>(27152-88)</del></wrap>((1986-1990 HD Sportster Parts Catalog pg 23)) - (27171-89) \\ (27152-89) - (27171-89)|N72F (27169-89)|
 |           |1991|27503-88B|160 / 42|(27152-89) - (27171-89)|N72F (27169-89)|
@@ Line 329: / Line 345: @@
 |            |2005-2006|27495-04|180 / 42|(27114-88) - (27171-89)|N4NN (28026-04)|
 |**XL1200** (Cal)|1988|27503-88 \\ No Accel Pump|180 / 35|( 27114-88) - (27117-88)|N65D (27099-88)|
-|            |1989-1990|27503-88A|<wrap hi><del>?</del></wrap> / 42 \\ 160((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) / 42|( <wrap hi><del>27152-88</del></wrap> ) (('86-'90 parts catalog lists 27152-88. Corrected to 27152-89 by the '86-'90 FSM and ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))  \\ (27152-89) - (27171-89)|N72F (27169-89)|
+|            |1989-1990|27503-88A|<wrap hi><del>?</del></wrap> / 42 \\ 160((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) / 42|( <wrap hi><del>27152-88</del></wrap> ) (('86-'90 parts catalog lists 27152-88. Corrected to 27152-89 by the '86-'90 FSM and ((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7))  \\ (27152-89) - (27171-89)|N72F (27169-89)|
 |            |1991|27503-88B|160 / 42|( 27152-89) - (27171-89)|N72F (27169-89)|
 |            |1992-Early 1993|27486-92|170((1991-1992 HD Sportster FSM pg 4-1))  / 40|(<wrap hi>27115-88</wrap>)- (27281-92)|N86P (27280-92)|
@@ Line 350: / Line 366: @@
 |           |1999-2001|27732-98|195 / 42|(27275-96Y) - (27171-89)|(27254-96)|
 |           |2002-2003|27732-98A|195 / 42|(27275-96Y) - (27171-89)|(27254-96)|
 ===== H D I Sportster Models =====
@@ Line 362: / Line 376: @@
   * See [[techtalk:evo:carb01#discrepancies_in_the_fsm_s_parts_catalog_s|Discrepancies in the FSM(s) / Parts Catalog(s)]] for further information on highlighted <wrap hi>*</wrap> areas in the carburetor charts below
   * See also [[techtalk:evo:carb01#Pics of Keihin CV Carbs That Were Factory Installed on Sportsters|Pics of Keihin CV Carbs That Were Factory Installed on Sportsters]]
 {{  :techtalk:evo:carb:cv40-needle-jet.jpg?180| Annotated by IXL2Relax at the XLForum}}{{  :techtalk:evo:carb:cv40-needle-em-jets.jpg?300| Photo by IXL2Relax at the XLForum}} Example Parts Shown Here >>>\\
@@ Line 369: / Line 382: @@
 **All CV40 carbs use the following parts & P/N:**\\
 \\
--88 - Needle Jet (.114" ID)((Don Burton at http://xlforum.net/forums/showthread.php?t=14949))\\
+-88 - Needle Jet (.114" ID)((Don Burton at https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/9621-carb-adjusting-where-are-the-jets-and-the-mixture-screw?t=14949))\\
 -88 - Emulsion Tube (Needle Jet Holder)\\
 -88 - Vacuum Slide (Vacuum Piston)\\
@@ Line 376: / Line 389: @@
-^Sportster Model^Year^ Keihin CV 40mm \\ Carb Serial # ^ Main / Slow \\ Jet Size ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))^  Main / Slow Jet \\ (Part #s)  ^ Keihin Needle \\ for Vac Slide((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) ^
+^Sportster Model^Year^ Keihin CV 40mm \\ Carb Serial # ^ Main / Slow \\ Jet Size ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))^  Main / Slow Jet \\ (Part #s)  ^ Keihin Needle \\ for Vac Slide((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) ^
 |**XL883** Swiss \\ All Models|1989-1990|27492-89 \\ No Accel Pump|? / 35|(27104-89) - (27117-88)|? (27164-89?)|
 |**XL883** \\ HDI / Swiss|1989-1990|27501-88 \\ No Accel Pump|? / 35|(27104-89) - (27117-88)|? (27164-89)|
@@ Line 433: / Line 446: @@
 |**XL1200R** \\ HDI|2004-2006|27749-04|160 / 42|(27152-89) - (27171-89) \\ HDI, Japan|N9EY (28027-04)|
 |**XL1200S** \\ HDI|1996-1997|27076-95|190 / 42|(27243-95) - (27171-89)|N65J(27187-93)((Not listed in 2007 Parts Catalog))|
-|HDI|1998|27734-98|<wrap hi>190</wrap> ((1998 HD XLH FSM pg 4-1)) / 42|(<wrap hi>27243-95</wrap>)((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) - (27171-89)|N86K (27278-93)|
+|HDI|1998|27734-98|<wrap hi>190</wrap> ((1998 HD XLH FSM pg 4-1)) / 42|(<wrap hi>27243-95</wrap>)((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) - (27171-89)|N86K (27278-93)|
-|Swiss|1998|27733-98|<wrap hi>195</wrap> ((1998 HD XLH FSM pg 4-1)) / 42|(27275-96Y)((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7)) - (27171-89)|<wrap hi>N86K (27278-93)</wrap>|
+|Swiss|1998|27733-98|<wrap hi>195</wrap> ((1998 HD XLH FSM pg 4-1)) / 42|(27275-96Y)((Cross-reference numbers by Folkie from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7)) - (27171-89)|<wrap hi>N86K (27278-93)</wrap>|
 |HDI|1999-2000|27734-98|200 / 42|(27105-88) - (27171-89)|N86K (27278-93)|
 |HDI/Aust/Eng/Japan|2001|27749-01|185 / 42|(27185-90) - (27171-89)|(27647-01)|
 |HDI/Aust/Eng/Japan|2002-2003|27749-01A|185 / 42|(27185-90) - (27171-89)|(27647-01)|
+\\
+===== Slow & Main Jets - P/N & Comparisons =====
+^  Chart of Slow (Pilot) Jet Size Differences  |||||||
+| Number | HD Part # | MM | Dia Inches | Area Inch² | %+ of\\ Prev Jet | %± of\\ 42 Jet |
+^ |||||||
+| Keihin 35 | 27117-88 | 0.35 | 0.013780 | 0.0001491 | ~~ | -30.56 |
+| Keihin 40 | 27281-92 | 0.40 | 0.015748 | 0.0001947 | 30.61 | -9.30 |
+| Keihin 42 | 27171-89 | 0.42 | 0.016535 | 0.0002146 | 10.25 | --TYP-- |
+| Keihin 45 | 27170-89 | 0.45 | 0.017717 | 0.0002464 | 14.80 | 14.80 |
+| Keihin 48 | 27165-90 | 0.48 | 0.018898 | 0.0002803 | 13.78 | 30.61 |
+| |||||||
+| Keihin 44 | CV-Perf | 0.44 | 0.017323 | 0.0002356 |  | 9.75 |
+| Keihin 46 | CV-Perf | 0.46 | 0.018110 | 0.0002575 |  | 19.95 |
+| Keihin 50 | CV-Perf | 0.50 | 0.019685 | 0.0003042 |  | 41.72 |
+| |||||||
+| CV-Perf is for CV-Performance.com |||||||
+| Keihin P/N for above listed jets is N424-25B-XX <-- where XX is the size |||||||
+| The N424-25B-XX series jets have 0.8mm bleed (cross) holes |||||||
+| |||||||
+^  Chart of Main Jet Size Differences  |||||||
+| Number | HD Part # | MM | Dia Inches | Area Inch² | %+ of\\ Prev Jet | %± of\\ 170 Jet |
+^ |||||||
+| Keihin 160 | 27152-89 | 1.60 | 0.062992 | 0.0031149 | ~~ | -11.42 |
+| Keihin 165 | 27116-88 | 1.65 | 0.064961 | 0.0033126 | 6.35 | -5.80 |
+| Keihin 170 | 27115-88 | 1.70 | 0.066929 | 0.0035164 | 6.15 | --TYP-- |
+| Keihin 175 | 27090-89 | 1.75 | 0.068898 | 0.0037263 | 5.97 | 5.97 |
+| Keihin 180 | 27114-88 | 1.80 | 0.070866 | 0.0039423 | 5.80 | 12.11 |
+| Keihin 185 | 27185-90 | 1.85 | 0.072835 | 0.0041643 | 5.63 | 18.43 |
+| Keihin 190 | 27243-95 | 1.90 | 0.074803 | 0.0043925 | 5.48 | 24.91 |
+| Keihin 195 | 	27275-96Y | 1.95 | 0.076772 | 0.0046267 | 5.33 | 31.57 |
+| Keihin 200 | 27105-88 | 2.00 | 0.078740 | 0.0048670 | 5.19 | 38.41 |
+| |||||||
+| Keihin P/N for above listed jets is N424-27-XXX <-- where XXX is the size |||||||
+| Area Inch² = 3.14 * DiaInches/2 * DiaInches/2 = π*r² |||||||
 \\
@@ Line 451: / Line 501: @@
 |91-92|00000-86 \\ (91-Cal)|91-* XL1200|(91-92) Xl1200 (domestic) \\ (91) Xl1200 (California)|Both Cal and Dom models|
 |93-94|00000-87 (93-Cal)\\ 00000-86|93-* XL883\\ 93-* XL883|(93-94) Xl883 (California) only\\ (93-94) XL883 all models|Reads it but doesn't mean for Domestic\\ Domestic (49 state models)|
 **Found and documented discrepancies are in the chart below**. I'm sure I didn't list them all ((Hippysmack))
 |Engine                    |XL883|||XL1200|||
-|**2004 FSM** (erroneous info)((Folkie http://xlforum.net/forums/showthread.php?t=2006132&page=7))|49 State|California|HDI, Swiss|49 State|California|HDI, Swiss|
+|**2004 FSM** (erroneous info)((Folkie https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7))|49 State|California|HDI, Swiss|49 State|California|HDI, Swiss|
 |Main Jet \\ Corrected Size ((Verified with the 2004 HD Sportster Parts Catalog pgs 21,23))|<del><wrap hi>160</wrap></del> \\ 175|<del><wrap hi>170</wrap></del> \\ 180|<del><wrap hi>190</wrap></del> \\ 170|<del><wrap hi>175/190</wrap></del> \\ 180|<del><wrap hi>185-195</wrap></del> \\ 185|<del><wrap hi>200</wrap></del> \\ 160|
 |**2002, 2003 Parts Catalogs** show a Cali 883R carb but no jet sizes or other carb parts. \\ Listed same year 883 (Cali) data.((hippysmack))|||||||
@@ Line 473: / Line 521: @@
 |**1991-1992 Parts Catalog** is confusing to show (Cal)883 main jet as: (160) 27152-89 - main Jet (1991 Cal & Swiss; 1992 & later All 883, 1200 HDI & Swiss - 1991-1992 models. Doesn't seem to group (Cal)883 into the 92 models. Verified with 1991-1992 FSM pg 4-1((hippysmack))|||||||
 |**1990 Parts Catalog** does not list a main jet for an XL1200 (Domestic) model. \\ Verified with the 1986-1990 FSM pg 4-1.((hippysmack))|||||||
-|**1986-1990 Parts Catalog** has an errant main jet #27154-88 for (Cal) 883s. Confirmed as a 155 with the 1986-1990 Sportster FSM pg 4-1, cross referenced to serial #27154-89 ((Cross-reference numbers by Folkie  from the XLFORUM http://xlforum.net/forums/showthread.php?t=2006132&page=7))((hippysmack))|||||||
+|**1986-1990 Parts Catalog** has an errant main jet #27154-88 for (Cal) 883s. Confirmed as a 155 with the 1986-1990 Sportster FSM pg 4-1, cross referenced to serial #27154-89 ((Cross-reference numbers by Folkie  from the XLFORUM https://www.xlforum.net/forum/sportster-motorcycle-forum/sportster-motorcycle-intake-and-exhaust/sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/188380-cv-carb-clogged-tiny-main-air-jet/page7?t=2006132&page=7))((hippysmack))|||||||
 |**1986-1990 Parts Catalog** is very confusing on export model carb info. I.E., \\ **The carb numbers are (all with no accel pump)**: \\ 27491-89 / (Swiss only) / 89-90 XLH1200 \\ 27492-89 / Swiss only / 89-90 XLH883 All Models \\ 27501-88 / HDI only-1989 & later / 88-90 XL883 All Models \\ 27502-88 / HDI only-1989 & later / 88-90 XLH1200  \\ **These are the only main jets designated for export motors:** \\ 27102-89 / Main Jet (Swiss only) / 89- XLH 883 All Models \\ 27104-89 / Main jet (Swiss only) / 89-90 All Models \\  **These are the only slow jets designated for export motors:** \\ 27117-88 / Slow jet (Swiss only-1989) / 88 & 89 All Models \\ **These are the only needle jets designated for export motors:** \\ 27164-89 (Swiss only) / 89- XLH 883 All models \\ 27165-89 (Swiss only) / 89- XL1200 \\ **Everything else is either designated Domestic or California engines.** ((hippysmack))|||||||
-----
+\\
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