Rocker Arms & Parts
About Rocker Arms & Parts
Rocker arms are the levers that push the valves open, carrying motion from the cam or a pushrod. Their seals wear, and an oil leak at the rocker area is a common reason to open them. The two products here are a rocker arm seal kit and a rocker arm shim kit, both listed for Big Twin engines.
Both listings name Big Twin engines rather than a UTV or ATV model, so check each title and its fitment notes against your engine before ordering. A seal kit replaces the seals that keep oil in around the rocker assembly. A shim kit holds shims, which are thin spacers used to set clearance, and the service manual gives the specification.
The brand here is Drag Specialties. For other valve parts, see Camshafts, Engine Valves and Valve Guides, Springs & Parts, all part of Valvetrain Component.
FAQs on rocker arm parts
What does a rocker arm do?
A rocker arm is a lever that pivots to push a valve open. It gets its motion from the camshaft, directly or through a pushrod, and presses on the valve stem. Its seals and shims can need replacing over time.
What is a rocker arm shim kit for?
A shim kit holds thin spacers used to set clearance in the rocker arm assembly. Which shims you need depends on how your parts measure against the specification in your service manual, so measure first and then choose the thickness.
What does a rocker arm seal kit replace?
It replaces the seals around the rocker arm assembly that keep oil from leaking out. A seep or leak at the rocker area is the usual reason to fit one. Follow the service manual, and replace any gaskets you disturb.
How do I make sure these parts fit my engine?
Both products here are listed for Big Twin engines, so compare the engine family in each title with your own. Parts for a different engine will not fit, so confirm with your manual before you order.
