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 ...

If you have a lemon, make lemonade." Rather than complain about all the newfangled computer/smog technology, wise hot rodders are finding that they can adapt much of it to make their cars run faster.

Tarun is a gearhead who has been working on motorcycles for over 25 years and riding them even longer. A certified Harley-Davidson, Kawasaki, and Ducati mechanic, he loves working on motorcycles and ...

Tuning a carburetor to supply an engine with the correct jetting-air/fuel mixture has always been a job that almost impossible for most hot rod owners and tuners. In the past, most performance engine ...