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 ...

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 ...

When it comes to carburetor tuning, there is literally "no substitute for experience." The most successful tuners possess a near-instinctual "feel" for fuel system problems, based on their years of ...

Once you get into performance tuning a two-wheeler, you'll hear a lot of talk about motorcycle dyno tuning. Simply put, a dyno tune is the difference between two performance-tinkered motorcycles off ...