Heat insulator flange in 11 mm thickness, supplied incl. gaskets for all carburetors with approx. 70 mm thread spacing. This flange was used as standard on models with Keihin carburetors from 78-89 to prevent the formation of vapor bubbles in the float chamber. Replaces OEMs 29250-78A and 27077-78.
Note
Fits Harley-Davidson Big Twin & Sportster XL 78-89