The first step in getting more performance out of an engine is to let it breathe easier, and if there’s one thing Harley-Davidson owners like, it’s the distinctive sound of their V-Twin rumbling ...

Air filters, are important for motorcycles as they help keep uninvited particles out of your engine, and as a result your bike will last longer without having long-lasting damage done to it. You'll ...

Mikuni American's popular HSR42mm Series Smoothbore Carburetors are available in easily installed "Easy Kits" for all late model Harley-Davidson and other American V-Twin applications. Included are ...

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 ...