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techtalk:ih:carb01p [2019/10/11 00:37]
hippysmack [(B83K)]
techtalk:ih:carb01p [2019/10/20 15:57]
hippysmack [(B50A)]
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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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 ===== 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.]]\\