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techtalk:ih:carb01p [2019/10/11 00:36] hippysmack [(B83H)] |
techtalk:ih:carb01p [2020/04/01 20:16] hippysmack [IH: Carburetor, Intake Manifold & Exhaust Systems - Sub-01P] |
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The chart on the [[techtalk:ih:carb01#sportster_keihin_carburetors_by_year_model|Basic carb information page]] has the factory jetting information for Sportsters. \\ | The chart on the [[techtalk:ih:carb01#sportster_keihin_carburetors_by_year_model|Basic carb information page]] has the factory jetting information for Sportsters. \\ | ||
You may have to go up or down from there depending on what's already in your carb and your specific engine/A/C/exhaust setup. \\ | You may have to go up or down from there depending on what's already in your carb and your specific engine/A/C/exhaust setup. \\ | ||
+ | |||
+ | Also, 76-78 Sportster carbs have a 38mm venture (measured at the smallest point near the throttle plate). \\ | ||
+ | 79-87 Sportster carbs have a 34mm venture. However, the carbs installed on BT's may be 38mm. \\ | ||
+ | To find the venture size of the one you have, cut a piece of cereal / kleenex box cardboard 34mm wide and insert it into the most narrow part of the venturi. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?p=4457592&highlight=keihin+bowl#post4457592)) \\ | ||
+ | Tight fit = 34 mm, loose fit = 38 mm. \\ | ||
+ | |||
See the pics below for a visual confirmation of year model features. \\ | See the pics below for a visual confirmation of year model features. \\ | ||
- | {{:techtalk:ih:carb:keihin_butterfly_carb_id_3.jpg?direct&300|}} \\ | + | {{:techtalk:ih:carb:keihin_butterfly_carb_id_3.jpg?direct&300|}} {{:techtalk:ih:carb:keihin_butterfly_27155-76_860d_.jpg?direct&300|}} \\ |
{{:techtalk:ih:carb:keihin_butterfly_carb_id_2.jpg?direct&300|}} {{:techtalk:ih:carb:keihin_butterfly_carb_id_1.jpg?direct&300|}} \\ | {{:techtalk:ih:carb:keihin_butterfly_carb_id_2.jpg?direct&300|}} {{:techtalk:ih:carb:keihin_butterfly_carb_id_1.jpg?direct&300|}} \\ | ||
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===== (B50A) ===== | ===== (B50A) ===== | ||
L1976 27153-76 Sportster '76 only' Keihin butterfly carb. \\ | L1976 27153-76 Sportster '76 only' Keihin butterfly carb. \\ | ||
- | Float bowl (27395-76). \\ | + | Float bowl (27359-76). \\ |
- | Accelerator pump 27364-76. \\ | + | Accelerator pump (27364-76), inside casting# (1-2). \\ |
It has a solid choke, meaning that the choke plate (butterfly) has no spring action in the linkage. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1035453)) \\ | It has a solid choke, meaning that the choke plate (butterfly) has no spring action in the linkage. ((Dr Dick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1035453)) \\ | ||
You can begin to identify -76 only carb cause there is no plastic pieces on the choke shaft. \\ | You can begin to identify -76 only carb cause there is no plastic pieces on the choke shaft. \\ | ||
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1977-1978 27153-77 Sportster XLH, XLCH, XLT Keihin Butterfly carb. \\ | 1977-1978 27153-77 Sportster XLH, XLCH, XLT Keihin Butterfly carb. \\ | ||
Float bowl (27384-77). \\ | Float bowl (27384-77). \\ | ||
- | Accelerator pump (27364-76). \\ | + | Accelerator pump (27364-76), inside casting# (1-2). \\ |
{{:techtalk:ih:carb:keihin_butterfly_carb_1_by_maritimer.jpg?direct&300|}} ((photo by maritimer of the XLFORUM http://xlforum.net/forums/showthread.php?postid=1920224)) {{:techtalk:ih:carb:keihin_butterfly_carb_2_by_maritimer.jpg?direct&300|}} ((photo by maritimer of the XLFORUM http://xlforum.net/forums/showthread.php?postid=1920224)) \\ | {{:techtalk:ih:carb:keihin_butterfly_carb_1_by_maritimer.jpg?direct&300|}} ((photo by maritimer of the XLFORUM http://xlforum.net/forums/showthread.php?postid=1920224)) {{:techtalk:ih:carb:keihin_butterfly_carb_2_by_maritimer.jpg?direct&300|}} ((photo by maritimer of the XLFORUM http://xlforum.net/forums/showthread.php?postid=1920224)) \\ | ||
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Soft plug over the A/F mixture screw. \\ | Soft plug over the A/F mixture screw. \\ | ||
Black plug over evaporative port. \\ | Black plug over evaporative port. \\ | ||
- | Float bowl (27331-83) (B83H). \\ | + | Float bowl (27331-83) (B83H). Casting marks inside the bowl: 328:1 \\ |
Accelerator pump (27891-80). \\ | Accelerator pump (27891-80). \\ | ||
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Main jet 160, slow jet 52. \\ | Main jet 160, slow jet 52. \\ | ||
Soft plug over the A/F mixture screw. \\ | Soft plug over the A/F mixture screw. \\ | ||
- | Float bowl (27331-83) (B83H). \\ | + | Float bowl (27331-83) (B83H). Casting marks inside the bowl: 328:1 \\ |
Accelerator pump (27891-80). \\ | Accelerator pump (27891-80). \\ | ||
Black plug over evaporative port. \\ | Black plug over evaporative port. \\ | ||
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Air Fuel Screw is on top, not buried under a cap. \\ Accelerator pump has check ball, not the rod. \\ | Air Fuel Screw is on top, not buried under a cap. \\ Accelerator pump has check ball, not the rod. \\ | ||
Low speed jet is covered with rubber plug and there is a hole between the low speed and main well. \\ | Low speed jet is covered with rubber plug and there is a hole between the low speed and main well. \\ | ||
+ | Float bowl: ((1970-1978 HD Electra Glide and Super Glide Parts Catalog pg 17)) \\ | ||
+ | 76-E77 (27359-76). \\ | ||
+ | L77-78 (27359-76A). \\ | ||
+ | Accelerator pump 76-78 (27364-76). ((1970-1978 HD Electra Glide and Super Glide Parts Catalog pg 17)) \\ | ||
===== (B28K) ===== | ===== (B28K) ===== | ||
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===== 27029-86 ===== | ===== 27029-86 ===== | ||
+ | 1988 FLT or FXR. 38mm venture. ((NH86XL883 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1258235)) \\ | ||
{{:techtalk:evo:carb:idle_mixture_screw_1_by_sifty.jpg?direct&300|}} ((photo by sifty of the XLFORUM http://xlforum.net/forums/showthread.php?t=1592463&page=48)) \\ | {{:techtalk:evo:carb:idle_mixture_screw_1_by_sifty.jpg?direct&300|}} ((photo by sifty of the XLFORUM http://xlforum.net/forums/showthread.php?t=1592463&page=48)) \\ | ||
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====== Helpful Links ====== | ====== Helpful Links ====== | ||
**Video**: \\ | **Video**: \\ | ||
- | Here are some excellent videos of servicing the pre-CV Keihin Butterfly carbs:((Used by permission - SportsterPavel at the XLForum - http://xlforum.net/forums/showthread.php?t=2055701)) | + | Here are some excellent videos of servicing the pre-CV Keihin Butterfly carbs: ((Used by permission - SportsterPaul at the XLForum - http://xlforum.net/forums/showthread.php?t=2055701)) |
* [[https://youtu.be/f_Ek37GEEN4|#1 - Tips and tricks.]]\\ | * [[https://youtu.be/f_Ek37GEEN4|#1 - Tips and tricks.]]\\ |