ProX Valve Shim

ProX valve shims are precision-ground valve adjustment shims (also called valve clearance shims or tappet shims). They are used to set accurate valve lash on shim-under-bucket valve trains in motorcycles, ATVs and other powersports engines. Setting valve clearance to specification helps the engine run smoothly, start easily and make consistent power.

Key Features:

• Precision-machined for consistent thickness and flat, parallel faces
• Hardened for durability under repeated valve train loads
• Available in a range of diameters and thicknesses so you can fine-tune valve clearance
• Suited to engine rebuilds, top-end service and routine valve clearance adjustments

Fitting the correct shim helps maintain proper valve timing and reduces wear on valve train components. Each part number in the ProX line is a different shim diameter and thickness. Pick the one that matches the measurement your valve clearance check calls for.