The GYTR High Compression Piston Kit provides a performance boost throughout the RPM range while maintaining a high level of durability. Machined valve pockets provide additional valve clearance when used with higher lift camshafts. The kit includes piston rings, piston pin, and clips (use stock replacements). Requires use of minimum 100-octane racing fuel.

Boosts engine compression ratio to 14.6:1 (with stock head) or 15.3:1 (with accessory GYTR Port Cylinder Head Assembly).

Restricted to closed-course use.

Fits:

• 2019 – 2020 YZ250F