Collection: valvetrain

At the heart of every V-Twin engine is an invisible rhythm. Pistons move up and down, valves open and close, fuel and air meet, and then that familiar pulse is born, giving character to a Harley-Davidson or other American V-Twin. The valvetrain's task is to ensure all of this happens in perfect harmony. Camshafts, chains, gears, lifters, pushrods, and other valvetrain components work together to make the engine breathe precisely when it needs to. This system fundamentally defines the engine's character, power, torque, and throttle response. There are riders for whom the valvetrain is only important as long as it functions flawlessly. Others know precisely what a dramatic effect a well-chosen camshaft or a precisely assembled valvetrain can have on the engine's behavior. In this category, you will find components that make up one of the engine's most important systems. Whether for maintenance, overhaul, or performance enhancement, the appropriate valvetrain is a cornerstone of any serious engine build. Because performance is not a matter of chance. Behind every engine with character, there is a perfectly synchronized rhythm at work.