Piston kit 76.81mm Bore 76.77 Wossner 8925DB (+0.01) Honda
CRF250R 2016 - 2017, Wossner forged pistons are superior in strength and design. Engineered to provide the best possible path for combustion chamber heat transfer to cylinder walls. Elliptically designed to provide a more uniform bearing surface under piston heat expansion, eliminating localized pressure and distributing thrust loads more evenly, thereby preventing piston collapse. Made in Germany. Part No. 56-W8800.00B.WO
Lock P/N CW16
Pin P/N WP070
Ring Set P/N 768XAS-2 Piston to Bore Clearance: Wossner pistons already have the recommended clearance built in. Skirt diameter is smaller than the recommended bore size (see sizing on box). Some applications: Nitrous, supercharged, turbo, and cold water marine engines may need more than the recommended clearance.
Pistons are measured 90 degrees from the piston pin axis of the piston skirt, with a micrometre and then a ball