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 ...

Even a kidwith a screwdriver can benefit from a little knowledge of what thattwist of the screw is doing, while more serious Mopar motorheads cangain a fistful of power with a well-considered ...

A lambda probe (or oxygen sensor) can be found on the exhaust system of most cars running on unleaded fuel. Having reached its normal operating temperature (of about 600 degrees Celsius!) the lambda ...

For more than 50 years, the classic Holley 4150-style four-barrel has remained a constant presence in the automotive world, as it evolved into almost countless versions for OEM and aftermarket ...