Yamaha YZ250F WR250F Cosworth Piston Kit 13.9:1 2005-2013 77mm

Normal price £205.00

Brand new in box. 

Cosworth piston kit including rings, clips & pin for Yamaha YZ250F/WR250F - 77mm Bore, 13.9:1 compression

• Ultra high performance, low friction, free revving, forged competition motocross pistons
• Forged from proprietary 2618 high tensile strength alloy
• Polished crowns to reduce carbon build up and to minimize the effects of hot spots which can lead to detonation
• Top ring land scrolling protects against scuffing, provides oil retention aiding lubrication, and reduces crevice volume that can lead to detonation
• The accumulator grooves aids compression ring sealing under high cylinder pressures

Please note the main image is a stock image and may not be for the model stated on the listing.