YX & ZS Valve Shim Upgrade

These sit under the valve spring against the cylinder head casting.

Fits:

• ZS Engines - 2 valve

• YX Engines - 2 valve

Spec:

• SHIM O.D = 22.86mm

• SHIM I.D = 16.80mm

• SHIM THICKNESS = Choice Of

Please Note:

• Increasing valve spring preassure can increase engine performance and RPM. It can also create more wear on other components. Too much preassure can create damage to components and also a loss of power.

Item Includes:

• 2x Shim Washers