YAMAHA YZ450F 03-09/WR 03-10 13:1 CR PISTON 4786M09700

Forged from high-silicon aluminum alloy for maximum strength and dependability.

Innovative forging design and piston skirt provide maximum horsepower and torque.

Wiseco High-Performance piston kits are priced with piston, rings, pins and circlips (unless noted otherwise).

Oversize pistons require cylinder sleeving.

Manufacturer Part #: 4786M09700

Prop 65 WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm. For more information go to www.P65Warnings.ca.gov.