Piston kit 77.01mm Wossner 8957DB (+0.01)
YAMAHA
YZ 250 F 2019, 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-W8812.B.WO WOSSNER PISTON KIT 8957DB