Harley-Davidson has used the 40mm Keihin constant velocity (CV) carburetor since 1988 on Sportsters and introduced them in 1990 on the Big Twins. The 1988 model differed from the 1989-and-later carbs ...

Last month we discussed the differences between a conventional carburetor and the Computer Command Control carburetor, and we covered how the mixture control solenoid worked. We also discussed how the ...

There probably is not a mathematical formula complicated enough to calculate how many perfectly good Holley carbs have been tossed aside in favor of newer models, just because they needed a rebuild.