Graves Motorsports Yamaha YZ250F High Compression Piston. Developed by the Team Graves Yamaha supermoto team for use on the 06-08 YZ250F Yamaha supermoto race bikes. This piston is compatible with oversize valves, higher lift cams and incorporates an X style forging for additional strength, durability and weight reduction. These pistons represent the highest quality of engineering available and is designed to deliver maximum power for your Supermoto or Off Road Dirtbike. Includes new cir clips and wrist pin.
NOTE: This piston is designed to run on race fuel only (example: VP Racing Fuel U4 or MR9).
Author: Kyle Guglielmetti
After building Brandon Currie's Team Graves Yamaha's YZ250F engines for 3 years, I have gone through a few different versions of Graves spec pistons. This is the ONE! Providing extra clearance around the edge of the combustion chamber and a single ring design give optimim performance and tunability.
