Mid-Range - High-Performance Camshafts what it's all About

Most motorcyclists who bought the obvious aftermarket engine performance replacements like sportier air-filters and exhaust-systems believe that the next step to increasing performance is to replace the camshaft by a high-performance cams.

High-performance cams, ported heads, larger carburetors, or modified injection systems, and wide-open exhaust system add little useful power below 4,500 rpm. They can and often reduce power below 4,000 rpm. This may go against most of what you may have heard about cams, pipes, air-filters and so on. But what I say has been verified many times on dynamo meters and on the street: Displacement and compression are your best friends when it comes to getting more power between 2,000 and 5,000 rpm from you motorcycle.