IH: Carburetor, Intake Manifold & Exhaust - Sub-01P

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====== IH: Carburetor, Intake Manifold & Exhaust - Sub-01P ======
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====== Keihin Butterfly Carb Identification ======
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 a Keihin Butterfly Carb]]
  * [[techtalk:ih:carb01r|Keihin Butterfly Carb Function and Tuning]]
  * [[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. \\
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|**Keihin** butterfly (non-CV)(Late 1976-1987)||  
|27153-76 ((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|Late 1976 XLH, XLCH|
|27153-77 ((HD Sportster Parts Catalog XLH/XLCH 99451-78B))|1977-1978 XLH, XLCH|
|27469-78A \\ B83A ((1979 Harley Davidson Sportster Parts Catalog))|1979 XL, XLCH, XLS| 
|27469-80A \\ B83D ((1979-1985 HD XL Parts Catalog pg 23))|1980 XL, XLS|
|27469-81A \\ B83F ((1979-1985 HD XL Parts Catalog pg 25))|1981-Early 1982 XL, XLS|
|27469-82 \\ B83G ((1979-1985 HD XL Parts Catalog pg 25))|Late 1982 XL, XLS|
|27469-83C \\ B83K ((1979-1985 HD XL Parts Catalog pg 27))|1983-1985 XL, XLS, XLX|
|27148-77 \\ B75A ((1977 HD XLCR Parts Catalog pg 57))|1977-1978 XLCR 1000|


76-78 Keihin carbs do not have an HD number on it or a stamp pad for numbering. The Keihin number is stamped in the flange. \\
The best way to identify a 79-up Harley Keihin carb is to read the Keihin number. \\
It's the first 4 characters stamped on the (R) choke cable side just above the bowl. \\
The HD part number on some models is on a sticker placed on the top of the carb. \\
Older carbs either weren't labeled or the sticker may either be missing or unreadable. \\

As for interchangeability between butterfly carbs; \\
Any Harley Keihin butterfly carb will interchange but the ones for big twins will need to be re-jetted for a Sportster engine. \\
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. \\

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. \\

{{: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|}}  \\

==== Late 1976-Early 1978 ====

      * Features:
        * 38mm venture ((Hopper http://xlforum.net/forums/showthread.php?t=276157&page=2))
        * Pump adjusting screw
        * Idle mixture Screw
        * Throttle stop screw
        * Rocker arm
        * Intake manifold ( 27021-71A )(( HD Sportster Parts Catalog (99451-78B) ))
        * Accelerator pump rod attached at throttle cam ((HD XLH XLCH-1000 Parts Catalog (99451-78B) ))
        * 1977
          * New diaphragm accelerator pump ((HD XLH XLCH-1000 Parts Catalog (99451-78B) ))
          * Optional main jets were made available ((HD Parts and Accessories Bulletin dated February 8, 1977)) 
       

==== Late 1978-1980 ====
Changes were made to L78-up carbs due to the [[sportster_history:99xx-01f|U.S. Clean Air Act of 1978]]. \\
      * Features/ Upgrades:
        * Changed to 34 mm venture ((Hopper http://xlforum.net/forums/showthread.php?t=276157&page=2))
        * Fast idle cam
        * Limiter Cap (over idle mixture )-late 1978-1979 \\ Square block behind the idle mix tower as a stop for the limiter cap.
        * Throttle stop screw, throttle lever
        * Choke plate
        * Choke lever shaft
        * Mounting flange
        * Accelerating pump lever
        * Rocker arm
        * Intermediate lever
        * 1979
          * Optional high altitude modification kit
          * Accelerator pump housing redesigned ((HD Sportster Parts Catalog pg 17))
          * Fast idle cam
        * 1980-up
          * Idle mixture screw is set and sealed off at the factory due to EPA regulations ((HD Service Letter #ML-131 dated September 14, 1979))

==== 1981-1983 ====

      * Features/ Upgrades:
        * 34mm venture
        * A second cable added at the throttle (idle cable)
        * Throttle lever
        * Throttle stop
        * Fast idle cam
        * Fast idle cam adjusting screw
        * Accelerator pump
        * 1983
          * 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))
==== 1984-1985 ====

      * Features/ Upgrades:
        * 34mm venture
        * Dual throttle cables
        * Throttle lever
        * Throttle lever stop
        * Voes vacuum port
        * Fast idle cam
        * Fast idle cam adjusting screw
        * VOES port
        * Evaporative port

====== Sportster Keihin Butterfly Carbs ======

===== (B50A) =====
L1976 27153-76 Sportster '76 only' Keihin butterfly carb. \\
Float bowl (27359-76). \\
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)) \\
You can begin to identify -76 only carb cause there is no plastic pieces on the choke shaft. \\
It also has a idle mixture adjusting screw that was not hidden under a plug. It was rite out in the open where you can get to it. \\
That is what you can tell from the outside. \\
{{:techtalk:ih:carb:l76_keihin_carb_1_by_ddddylan.jpg?direct&300|}} ((photo by DDDDylan of the XLFORUM http://xlforum.net/forums/showthread.php?p=4428805&highlight=keihin+bowl#post4428805)) {{:techtalk:ih:carb:l76_keihin_carb_2_by_ddddylan.jpg?direct&300|}} ((photo by DDDDylan of the XLFORUM http://xlforum.net/forums/showthread.php?p=4428805&highlight=keihin+bowl#post4428805)) \\

The real scoop to tell if it's -76 is on the inside. \\
Inside, there was no hole drilled between the main jet well and the low speed well to feed the low speed jet. \\
That made it the only one that didn't use the low speed jet rubber plug you see when you take off the float bowl. \\
This hole can be seen when you remove the rubber plug and look at the wall between the wells on 77 and up Keihin butterfly carbs. \\
77-up carbs have a hole to connect the low speed well to the main well. 76 only had no hole. \\
If you have a 76 only and install rubber plug, your bike won't run. \\
In the float bowl, the accelerator pump discharge nozzle has a .040" orifice, (stamped 100), as apposed to the .031" (stamped 75) used on 77 up. \\
But most importantly, it didn't have an accelerator pump "relief" port. You can observe the relief action (if you have a 77-up bowl). \\
Remove the bowl and the "L" shaped linkage that actuates the pump. Drop the "L" into its hole on the side of the bowl. \\
Pour enough fuel in the bowl so that you have it about 1/4 full and actuate the pump by depressing the "L" link (don't squirt on yourself). \\
On the 77-up, there is a little hole down on the bowl floor that fuel squirts out of, as well as the brass nozzle at the gasket surface. \\
The quicker you press, the more goes thru the "relief". \\
All "relief" bowls have a steel rod installed under the discharge nozzle. This rod is free in its movement and you can hear it if you shake the bowl. \\
This rod acts as "variable" resistance to fuel flow to the actual discharge nozzle. \\
If the pump is actuated slowly enough, all fuel will exit the relief because there isnt enough force to lift the rod. \\

'76 only' didn't have the rod at all. Instead, it used a check ball assembly in the small cover that is screwed onto the bowl (the one with the 3 holes). \\
When you shake the small cover when it's removed from the bowl, you will hear the ball. There is no ball on 77-up. \\
'76 only' has even more differences but those are the biggies. \\

The JP Cycles Deluxe Carb Rebuild Kit (4000050) will work. ((DeeDay of the XLFORUM http://xlforum.net/forums/showthread.php?t=1035453)) \\

L76 (only) XLH, XLCH main jet 140, slow jet 100, \\

{{:techtalk:ih:carb:76_keihin_carb_1_by_tld93030.jpg?direct&200|}} ((photo by TLD93030 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1035453)) {{:techtalk:ih:carb:76_keihin_carb_2_by_tld93030.jpg?direct&200|}} ((photo by TLD93030 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1721746&page=2)) {{:techtalk:ih:carb:76_keihin_carb_3_by_tld93030.jpg?direct&200|}} ((photo by TLD93030 of the XLFORUM http://xlforum.net/forums/showthread.php?t=1721746&page=2)) \\

===== (B50B) - (B50C)  =====
1977-1978  27153-77 Sportster XLH, XLCH, XLT Keihin Butterfly carb. \\
Float bowl (27384-77). \\
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:77-78_keihin_carb_3_by_pala.jpg?direct&250|}} ((photo by pala of the XLFORUM http://xlforum.net/forums/showthread.php?t=1771280&highlight=keihin+bowl&page=2)) {{:techtalk:ih:carb:77-78_keihin_carb_2_by_pala.jpg?direct&250|}} ((photo by pala of the XLFORUM http://xlforum.net/forums/showthread.php?t=1771280&highlight=keihin+bowl&page=2)) {{:techtalk:ih:carb:77-78_keihin_carb_1_by_pala.jpg?direct&250|}} ((photo by pala of the XLFORUM http://xlforum.net/forums/showthread.php?t=1771280&highlight=keihin+bowl&page=2)) \\

===== (B83A) - (B83B)=====
1979 Sportster  27469-78,((1979 HD Sportster Parts Catalog -79 pg 17))  27469-78A ((1980 HD Sportster Parts Catalog -80 pg 17)) XL, XLCH, XLS models, main jet 165, slow jet 65, limiter cap over the idle mixture screw. \\
Float bowl (27890-78) (B78A). \\
Accelerator pump (27891-78). Accel pump 27891-80 was sold in 1985 as a replacement on carb 27469-78A. ((1979-1985 HD Sportster Parts Catalog -85 pg 23)) \\
Idle mixture screw tower has a block made on the back of it as a stop for the limiter cap (27883-78). \\

{{:techtalk:ih:carb:79_keihin_idle_mix_tower.jpg?direct&200|}} {{:techtalk:ih:carb:1978l-1979_sportster_low_speed_mixture_screw_cap_27883-78_by_robison_motorcycles.jpg?direct&300|}}  ((photo courtesy of Ebay seller, Robison Motorcycles [[ https://www.ebay.com/str/robisonmotorcycles?_trksid=p2047675.l2563 |Link to Ebay Store]] )) \\

**B83A**: \\
{{:techtalk:ih:carb:keihin_butterfly_by_mickey_t.jpg?direct&300|}} ((photo by mickey t of the XLFORUM http://xlforum.net/forums/showthread.php?t=2073560&highlight=keihin&page=3)) \\

**B83B**: \\
{{:techtalk:ih:carb:keihin_carb_1_by_fireboy2600.jpg?direct&200|}} ((photo by Fireboy2600 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5676463&highlight=keihin#post5676463)) {{:techtalk:ih:carb:keihin_carb_4_by_fireboy2600.jpg?direct&200|}} ((photo by Fireboy2600 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5676463&highlight=keihin#post5676463)) {{:techtalk:ih:carb:keihin_carb_2_by_fireboy2600.jpg?direct&200|}} ((photo by Fireboy2600 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5676463&highlight=keihin#post5676463)) {{:techtalk:ih:carb:keihin_carb_3_by_fireboy2600.jpg?direct&200|}} ((photo by Fireboy2600 of the XLFORUM http://xlforum.net/forums/showthread.php?p=5676463&highlight=keihin#post5676463)) \\

===== (B83D) =====
1980 XL, XLS 27469-80, ((1980 HD Sportster Parts Catalog -80 pg 17)) 27469-80A ((1981 HD Sportster Parts Catalog -81 pg 19)) \\
Main jet 165, slow jet 65. \\
Float bowl (27890-78) (B78A). \\
Accelerator pump (27891-78). Accel pump 27891-80 was sold in 1985 as a replacement on carb 27469-80A. ((1979-1985 HD Sportster Parts Catalog -85 pg 23)) \\
Soft plug over the A/F mixture screw. \\

===== (B83E) =====
E1981-E1982 XL, XLS 27469-81 ((1981 HD Sportster Parts Catalog -81 pg 21)) ((1983 HD Sportster Parts Catalog -83 pg 23)) \\
Main jet 160, slow jet 68. \\
Soft plug over the A/F mixture screw. \\
Float bowl(27890-78) (B78A). \\
Accelerator pump (27891-78). \\
===== (B83F) =====
L1981-E1982 XL, XLS 27469-81A. ((1983 HD Sportster Parts Catalog -83 pg 23)) \\
Main jet 160, slow jet 68. \\
Soft plug over the A/F mixture screw. \\
Float bowl (27890-78) (B78A). \\
Accelerator pump (27891-80). \\

{{:techtalk:ih:carb:keihin_butterfly_1_by_terd_ferguson.jpg?direct&300|}} ((photo by terd ferguson of the XLFORUM http://xlforum.net/forums/showthread.php?t=1515905)) {{:techtalk:ih:carb:keihin_butterfly_2_by_terd_ferguson.jpg?direct&300|}} ((photo by terd ferguson of the XLFORUM http://xlforum.net/forums/showthread.php?t=1515905)) \\

===== (B83G) =====
L1982 XL, XLS 27469-82. ((1983 HD Sportster Parts Catalog -83 pg 23)) \\
Main jet 150, slow jet 68. \\
Soft plug over the A/F mixture screw. \\
Float bowl(27890-78) (B78A). \\
Accelerator pump (27891-80). \\
===== (B83H) =====
Float bowl (27331-83) (B83H). Casting marks inside the bowl: 328:1 \\
Accelerator pump (27891-80). \\

**E1983** 27469-83 XL, XLS, XLX. ((1984 HD Sportster Parts Catalog -84 pg 27)) \\ 
\\
**L1983** 27469-83A XL, XLS, XLX. ((1984 HD Sportster Parts Catalog -84 pg 27)) \\
Main jet 160, slow jet 52. \\
Soft plug over the A/F mixture screw. \\
Accelerator pump (27891-80). \\
Black plug over evaporative port. \\
{{:techtalk:ih:carb:83_keihin_butterfly_carb_by_ratrodder.jpg?direct&300|}} ((photo by RatRodder of the XLFORUM http://xlforum.net/forums/showthread.php?threadid=1670881)) \\

===== (B83K) =====
1984 27469-83B XL, XLS, XLX. \\
Main jet 160, slow jet 52. \\
Soft plug over the A/F mixture screw. \\
Black plug over evaporative port. \\
Float bowl (27331-83) (B83H). Casting marks inside the bowl: 328:1 \\
Accelerator pump (27891-80). \\

{{:techtalk:ih:carb:keihin_butterfly_off_84_pic_1_by_froddy.jpg?direct&200|}} ((photo by froddy of the XLFORUM http://xlforum.net/forums/showthread.php?t=861684&page=2)) {{:techtalk:ih:carb:keihin_butterfly_off_84_pic_2_by_froddy.jpg?direct&200|}} ((photo by froddy of the XLFORUM http://xlforum.net/forums/showthread.php?t=861684&page=2)) {{:techtalk:ih:carb:keihin_butterfly_off_84_pic_3_by_froddy.jpg?direct&200|}} ((photo by froddy of the XLFORUM http://xlforum.net/forums/showthread.php?t=861684&page=2)) \\

===== (B83K) =====
1985 27469-83C XL, XLS, XLX \\
Main jet 160, slow jet 52. \\
Soft plug over the A/F mixture screw. \\
Float bowl (27331-83) (B83H). Casting marks inside the bowl: 328:1 \\
Accelerator pump (27891-80). \\
Black plug over evaporative port. \\

{{:techtalk:ih:carb:keihin_butterfly_carb_1_by_hcrashster.jpg?direct&300|}} ((photo by hcrashster of the XLFORUM http://xlforum.net/forums/showthread.php?t=1786621)) \\

====== Other HD Keihin Butterfly Carbs ======
There are usually lots of compatible Keihin carbs on eBay. Anything from late 1976 up to about 1988 will bolt on and work well. ((Ironmick of the XLFORUM http://xlforum.net/forums/showthread.php?p=5465749&highlight=keihin+bowl#post5465749)) \\
They all "look" about the same but there are differences. (As for factory Sportster carbs), best may be the late 1976 to 1978 keihin butterfly. \\
It is 38 mm, and does not suffer the government mandated modifications that are in the 1979-on Keihins. \\

===== 27155-76 / 27155-76A =====
Application for all 76-E1978 FX models, FL, FLH. ((1971-1984 HD FX Model Parts Catalog pg 31)) ((1941-1984 FL Model Parts Catalog pg 39)) \\
No choke spring, no plastic on choke. ((Alford of the XLFORUM http://xlforum.net/forums/showthread.php?t=1035453)) \\
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. \\
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)) \\

===== (B28D) =====

27470-80. \\
Used on 1980 FXWG-80. \\
1984- All FX Models. \\

===== (B28H) =====

27470-81A. \\
Used on 1981-1983 FXS-80, FXB, FXWG, FXSB
===== (B28K) =====

{{:techtalk:ih:carb:keihin_b28k_pic_1_by_jezter.jpg?direct&300|}} ((photo by jester of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) {{:techtalk:ih:carb:keihin_b28k_pic_2_by_jezter.jpg?direct&300|}} ((photo by jester of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) {{:techtalk:ih:carb:keihin_b28k_pic_3_by_jezter.jpg?direct&300|}} ((photo by jester of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) \\

===== (B78A) =====

27466-78A. \\
Used on 1979 FXEF. \\

===== (B78B) =====
27466-78A. \\
Used on L1978-1979 FLH-80 and Classic. \\
{{:techtalk:ih:carb:79_up_keihin_butterfly_carb_by_pan-shovel-head51-79.jpg?direct&300|}} ((photo by pan-shovel-head51-79 of the XLFORUM)) \\

===== (B78D) =====

27466-80A. \\
Used on 1980 FFLH and Classic (sidecar- 1979-later) \\

===== (B78E) =====

{{:techtalk:ih:carb:keihin_b78e_pic_1_by_jezter.jpg?direct&300|}} ((photo by jezter of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) {{:techtalk:ih:carb:keihin_b78e_pic_2_by_jezter.jpg?direct&300|}} ((photo by jezter of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) {{:techtalk:ih:carb:keihin_b78e_pic_3_by_jezter.jpg?direct&300|}} ((photo by jezter of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) \\

===== (B78F) =====

27494-81A. \\
Used on 1981-1984 FLH, Classic. \\
===== (B79A) =====
27472-79. \\
This was the factory carb mounted to a 1979 FXS-80 / FXEF-80, main jet 160, low speed jet 72. \\
{{:techtalk:ih:carb:keihin_butterfly_27472-79_pic_4_by_jesse_eads.jpg?direct&300|}} ((photo by jesse_eads of the XLFORUM http://xlforum.net/forums/showthread.php?p=5778439#post5778439)) {{:techtalk:ih:carb:keihin_butterfly_27472-79_pic_1_by_jesse_eads.jpg?direct&300|}} ((photo by jesse_eads of the XLFORUM http://xlforum.net/forums/showthread.php?p=5778439#post5778439)) \\

{{:techtalk:ih:carb:keihin_butterfly_27472-79_pic_2_by_jesse_eads.jpg?direct&300|}} ((photo by jesse_eads of the XLFORUM http://xlforum.net/forums/showthread.php?p=5778439#post5778439)) {{:techtalk:ih:carb:keihin_butterfly_27472-79_pic_3_by_jesse_eads.jpg?direct&300|}} ((photo by jesse_eads of the XLFORUM http://xlforum.net/forums/showthread.php?p=5778439#post5778439)) \\

===== (B79B) =====

{{:techtalk:ih:carb:keihin_butterfly_carb1_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341)) \\

{{:techtalk:ih:carb:keihin_butterfly_carb2_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341)){{:techtalk:ih:carb:keihin_butterfly_carb4_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341)){{:techtalk:ih:carb:keihin_butterfly_carb3_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341))

{{:techtalk:ih:carb:keihin_butterfly_carb5_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341)){{:techtalk:ih:carb:keihin_butterfly_carb6_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341)){{:techtalk:ih:carb:keihin_butterfly_carb7_by_brendan.jpg?direct&220|}} ((photo by Brendan of the XLFORUM http://xlforum.net/forums/showthread.php?p=5759341))

===== (B79D) =====

27472-80A. \\
Used on 1980 FXS-80, FXEF-80, FXB. \\

===== (B79E) =====

{{:techtalk:ih:carb:keihin_b79e_pic_1_by_jezter.jpg?direct&300|}} ((photo by jester of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) {{:techtalk:ih:carb:keihin_b79e_pic_2_by_jezter.jpg?direct&300|}} ((photo by jester of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) {{:techtalk:ih:carb:keihin_b79e_pic_3_by_jezter.jpg?direct&300|}} ((photo by jester of the XLFORUM http://xlforum.net/forums/showthread.php?t=1392914)) \\

===== (B79F) =====
27472-81A. \\
1981-1983 FXEF-80 /  FXE-80 \\

{{:techtalk:ih:carb:keihin_carb3_by_abzy.jpg?direct&200|}} ((photo by abzy of the XLFORUM http://xlforum.net/forums/showthread.php?t=276157&page=13)) {{:techtalk:ih:carb:keihin_carb1_by_abzy.jpg?direct&200|}} ((photo by abzy of the XLFORUM http://xlforum.net/forums/showthread.php?t=276157&page=13)) {{:techtalk:ih:carb:keihin_carb2_by_abzy.jpg?direct&200|}} ((photo by abzy of the XLFORUM http://xlforum.net/forums/showthread.php?t=276157&page=13)) {{:techtalk:ih:carb:keihin_carb4_by_abzy.jpg?direct&200|}} ((photo by abzy of the XLFORUM http://xlforum.net/forums/showthread.php?t=276157&page=13)) \\

===== (B80B) =====

27467-78A. \\
Used on L1978-1979 FL, FLH. \\

===== (B80D) =====

27467-80A. \\
Used on 1980 FL, FLH. \\

===== (B81B) =====

27468-78A. \\
L1978-1979 FX, FXS, FXE \\
{{:techtalk:ih:carb:keihin_buttefly_1_by_spuggy.jpg?direct&300|}} ((photo by spuggy of the XLFORUM http://xlforum.net/forums/showthread.php?p=5694195&highlight=keihin#post5694195)) \\

{{:techtalk:ih:carb:keihin_buttefly_2_by_spuggy.jpg?direct&300|}} ((photo by spuggy of the XLFORUM http://xlforum.net/forums/showthread.php?p=5694195&highlight=keihin#post5694195)) {{:techtalk:ih:carb:keihin_buttefly_3_by_spuggy.jpg?direct&300|}} ((photo by spuggy of the XLFORUM http://xlforum.net/forums/showthread.php?p=5694195&highlight=keihin#post5694195)) {{:techtalk:ih:carb:keihin_buttefly_4_by_spuggy.jpg?direct&300|}} ((photo by spuggy of the XLFORUM http://xlforum.net/forums/showthread.php?p=5694195&highlight=keihin#post5694195)) \\

===== (B81D) =====

27468-80A. \\
1980 FX, FXS, FXEF \\

===== (B8?D) =====
27467-80. \\
This is reportedly a 1980 Shovelhead carburetor. ((stu Elpaso of the XLFORUM http://xlforum.net/forums/showthread.php?t=951659)) \\
{{:techtalk:ih:carb:keihin_butterfly_2_by_big_e78.jpg?direct&250|}} ((photo by Big_e78 of the XLFORUM http://xlforum.net/forums/showthread.php?t=951659)) {{:techtalk:ih:carb:keihin_butterfly_1_by_big_e78.jpg?direct&250|}} ((photo by Big_e78 of the XLFORUM http://xlforum.net/forums/showthread.php?t=951659)) {{:techtalk:ih:carb:keihin_butterfly_3_by_big_e78.jpg?direct&250|}} ((photo by Big_e78 of the XLFORUM http://xlforum.net/forums/showthread.php?t=951659&page=2)) \\

===== (B88R) =====

27034-86B. \\
1987 All FLT Models. \\

===== 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:ih:carb:keihin_butterfly_carb_1_by_sifty.jpg?direct&250|}} ((photo by sifty of the XLFORUM http://xlforum.net/forums/showthread.php?p=4294940#post4294940)) {{:techtalk:ih:carb:keihin_butterfly_carb_2_by_sifty.jpg?direct&250|}} ((photo by sifty of the XLFORUM http://xlforum.net/forums/showthread.php?p=4294940#post4294940)) {{:techtalk:ih:carb:keihin_butterfly_carb_3_by_sifty.jpg?direct&250|}} ((photo by sifty of the XLFORUM http://xlforum.net/forums/showthread.php?p=4294940#post4294940)) \\

===== (02BL) =====

27029-83D. \\
Used on 1984 FXST. \\

===== (02BP) =====

Part number unknown at this time, BT carb . Possible 83 model carb due to the black rubber cap on the top of the carb's evaporative port. ((IronMick of the XLFORUM http://xlforum.net/forums/showthread.php?t=1661384&highlight=keihin+bowl)) ((http://xlforum.net/forums/showthread.php?t=1918803&highlight=keihin&page=2)) \\
Just leave it capped. It has no practical use. \\
{{:techtalk:ih:carb:keihin_butterfly_carb_1_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_2_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_3_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) \\

{{:techtalk:ih:carb:keihin_butterfly_carb_4_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_5_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_6_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) \\

{{:techtalk:ih:carb:keihin_butterfly_carb_7_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_8_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_9_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) \\

{{:techtalk:ih:carb:keihin_butterfly_carb_10_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_11_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_12_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) \\

{{:techtalk:ih:carb:keihin_butterfly_carb_13_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_14_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) {{:techtalk:ih:carb:keihin_butterfly_carb_15_by_robicycle.jpg?direct&300|}} ((photo by Robicycle of the XLFORUM http://xlforum.net/forums/showthread.php?t=1663198&highlight=keihin+bowl)) \\

===== (02BQ) =====
27029-86B. \\
Used on All 1986 FX Models. \\

{{:techtalk:ih:carb:keihin_butterfly_1_by_maustarman.jpg?direct&200|}} ((photo by Maustarman of the XLFORUM http://xlforum.net/forums/showthread.php?t=2020910)) {{:techtalk:ih:carb:keihin_butterfly_2_by_maustarman.jpg?direct&200|}} ((photo by Maustarman of the XLFORUM http://xlforum.net/forums/showthread.php?t=2020910)) \\

===== (02BR) =====

27029-86B. \\
All 1987 FXR, Softail models, main jet 162, slow jet 50 \\
{{:techtalk:ih:carb:keihin_carb_by_popgadget.jpg?direct&300|}} ((photo by Popgadget of the XLFORUM http://xlforum.net/forums/showthread.php?p=5722462&highlight=keihin#post5722462)) {{:techtalk:ih:carb:kehien_butterfly_carb_1_by_racedvl.jpg?direct&300|}} ((photo by racedvl of the XLFORUM http://xlforum.net/forums/showthread.php?t=1791419)) {{:techtalk:ih:carb:kehien_butterfly_carb_2_by_racedvl.jpg?direct&300|}} ((photo by racedvl of the XLFORUM http://xlforum.net/forums/showthread.php?t=1791419)) \\

===== 27029-88 =====

Other numbers on body: (0695) and (F58A) (BH28)  for 88-89 FLT, FXR and SOFTAIL models (except Cal.) ((https://serviceinfo.harley-davidson.com/sip/service/procedure/5697/PDF/f52c2fcc-9daa-4115-a6f7-006df7a9d140/en_US?uid=f52c2fcc-9daa-4115-a6f7-006df7a9d140&time=1480204850000&baseUrl=%2Fcontent%2Fdocument%2Fview%3Fid%3D5697)) \\

{{:techtalk:ih:carb:keihin_carb_1_by_freewheeler.jpg?direct&200|}} ((photo by Freewheeler of the XLFORUM http://xlforum.net/forums/showthread.php?t=1918803&highlight=keihin)) {{:techtalk:ih:carb:keihin_carb_2_by_freewheeler.jpg?direct&200|}} ((photo by Freewheeler of the XLFORUM http://xlforum.net/forums/showthread.php?t=1918803&highlight=keihin))  {{:techtalk:ih:carb:keihin_carb_by_icefire.jpg?direct&300|}} ((photo by Icefire of the XLFORUM http://xlforum.net/forums/showthread.php?t=84429)) \\

{{:techtalk:ih:carb:kehien_butterfly_carb_1_by_vwtopia.jpg?direct&300|}} ((photo by vwtopia of the XLFORUM http://xlforum.net/forums/showthread.php?threadid=1662810)) {{:techtalk:ih:carb:kehien_butterfly_carb_2_by_vwtopia.jpg?direct&300|}} ((photo by vwtopia of the XLFORUM http://xlforum.net/forums/showthread.php?threadid=1662810))  {{:techtalk:ih:carb:kehien_butterfly_carb_3_by_vwtopia.jpg?direct&300|}} ((photo by vwtopia of the XLFORUM http://xlforum.net/forums/showthread.php?threadid=1662810)) \\

===== (F58A) =====
27029-88. \\
88-89 FLT, FXR and SOFTAIL models. \\

===== (F59B) =====
27026-88A. \\
88-89 FLT, FXR and SOFTAIL models (Cal. and Swiss models only) ((https://serviceinfo.harley-davidson.com/sip/service/procedure/5697/PDF/f52c2fcc-9daa-4115-a6f7-006df7a9d140/en_US?uid=f52c2fcc-9daa-4115-a6f7-006df7a9d140&time=1480204850000&baseUrl=%2Fcontent%2Fdocument%2Fview%3Fid%3D5697)) \\

{{:techtalk:ih:carb:27026-88a_keihin_by_tuanis.jpg?direct&200|}} ((photo by Tuanis of the XLFORUM http://xlforum.net/forums/showthread.php?t=2029663)) \\

===== (F20Q) =====

{{:techtalk:ih:carb:keihin_butterfly_carb_2_by_mrironhead.jpg?direct&300|}} ((MrIronHead of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072120)) {{:techtalk:ih:carb:keihin_butterfly_carb_1_by_mrironhead.jpg?direct&300|}} ((MrIronHead of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072120)) \\

{{:techtalk:ih:carb:keihin_butterfly_carb_3_by_mrironhead.jpg?direct&300|}} ((MrIronHead of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072120)) {{:techtalk:ih:carb:keihin_butterfly_carb_4_by_mrironhead.jpg?direct&300|}} ((MrIronHead of the XLFORUM http://xlforum.net/forums/showthread.php?t=2072120)) \\

===== Accelerator Pump Pics =====

{{:techtalk:ih:carb:keihin_accelerator_pump_27891-78_by_animalhouse2010.jpg?direct&400|}} ((photo by Ebay seller, animalhouse2010. [[https://www.ebay.com/str/animalhouse2010|Link to Store]]. )) \\
====== Parts List ======

|L1976 Keihin (butterfly) Carb|||
|27006-76|CARBURETOR REPAIR KIT|L1976|
|27153-76|CARBURETOR|L1976|
|27304-76|SCREW, choke cable bracket|L1976|
|27305-76|BRACKET, choke cable|L1976|
|27306-76|ADJUSTING SCREW, pump stroke|L1976|
|27307-76|SCREW, wire block|L1976|
|27308-76|PIN, float|L1976|
|27309-76|SCREW, float pin|L1976|
|27310-76|ROD, accelerator pump|L1976|
|27311-76|RUBBER CAP, accelerator pump|L1976|
|27312-76|0-RING|L1976|
|27313-76|SCREW, throttle stop|L1976|
|27314-76|SPRING, throttle stop screw|L1976|
|27315-76|ADJUSTING SCREW, low speed mixture|L1976|
|27319-76|SPRING, low speed mixture adjusting screw|L1976|
|27320-76|SCREW, throttle cable bracket|L1976|
|27321-76|BRACKET, throttle cable|L1976|
|27322-76|SPRING, throttle lever|L1976|
|27328-76|THROTTLE LEVER|L1976|
|27333-76|SPRING WASHER, throttle lever|L1976|
|27335-76|NUT, throttle lever|L1976|
|27336-76|0-RING|L1976|
|27337-76|FLOAT VALVE, with clip|L1976|
|27338-76|CLIP, float valve|L1976|
|27339-76|FLOAT|L1976|
|27340-76|MAIN NOZZLE|L1976|
|27348-76|LOW SPEED JET|L1976|
|27358-76|0-RING, bowl|L1976|
|27360-76|0-RING (2)|L1976|
|27361-76|DIAPHRAGM, accelerator pump|L1976|
|27362-76|SPRING, diaphragm|L1976|
|27364-76|ACCELERATOR PUMP HOUSING|L1976|
|27366-76|SCREW (5)|L1976|
|27367-76|SCREW|L1976|
|27368-76|CLIP, overflow hose|L1976|
|27369-76|HOSE, overflow|L1976|
|27395-76|BOWL|L1976|
|27397-76|MAIN JET, 1.55 mm. (1001-104-155)|L1976|
|27398-76|MAIN JET, 1.50 mm. (1001-104-150)|L1976|
|27399-76|MAIN JET, 1.45 mm. (1001-104-145)|L1976|
|27400-76|MAIN JET, 1.35 mm. (1001-104-135)|L1976|
|27401-76|MAIN JET, 1.30 mm. (1001-104-130)|L1976|
|27594-76|INLET FITTING|L1976|
|27615-76|MAIN JET, 1.40 mm. (1001-104-140)|L1976|

====== Helpful Links ======
**Video**: \\
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/OC75jFhAwLc|#2 - Disassembly and cleaning.]]\\
  * [[https://youtu.be/WaZHg2Brl3U|#3 - Assembly and testing.]]\\
  * [[https://youtu.be/5Q26WDIxWek|#4 - Testing and start-up.]]\\

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