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IH: Carburetor, Intake Manifold & Exhaust Systems - Sub-01B


Bendix Carb Identification

There were three Bendix carburetors, designated in the parts catalogs, that were installed on Sportsters.

Year ModelHD Part #Venture Size
E197227155-72 1)38mm
L1972-197427155-72A 2)38mm
1975-Early 1976
(also '71-'75 FX models)
27155-72B 3) 4) 5) 38mm

36mm and 38mm Comparison

Side by side comparison of 36mm and 38mm Bendix carbs.
Aside from the venturi size, the other main difference that might affect the way it runs is the number of secondary idle discharge ports.
These are the holes that get uncovered by the throttle plate at part throttle settings.
The 38mm has 3 (in addition to the idle adjustment screw hole).
The 36 has 2 (in addition to the idle adjustment screw hole).
The air cleaner screw bosses on the 36mm are smaller.

(Left) 38mm, (Right) 36mm 6) 36mm doesn't have a bowl vent hole here 7) (L) 38mm has a flat corner, (R) 36mm is round 8)

Main Jets

Bendix C66-184 adjustable main jet 9)


1)
1972,1973 HD Sportster Parts Catalog Supplements (99451-72), (99451-73)
2)
1973, 1974 HD Sportster Parts Catalog Supplements (99451-73) (99451-74)
3)
1975 HD Sportster Parts Catalog Supplement (99451-75)
4)
1976 HD Sportster Parts Catalog Supplement (99451-76)
5)
1971-1984 HD FX Parts Catalog pg 35
6) , 7) , 8)
photo by needspedd of the XLFORUM http://xlforum.net/forums/showthread.php?t=1993814
9)
photo by Popgadget of the XLFORUM http://xlforum.net/forums/showthread.php?t=2071986
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