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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 ...

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At its core, a carburetor is simply a metered air leak. Its job is to mix air and fuel, and provide it in the proper amounts to the engine at the right time. That's easy enough to do if you are drag ...

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 ...

The last time we talked about carburetors, we focused on getting the idle mixture and speed in line. But that’s not all that a carb requires of its owner. Having your idle in line doesn’t mean the car ...