Piston kit 77.01mm Bore 76.96 Wossner 8946DB (+0.01)
YAMAHA
YZ 250 F 2016-18,
(High compression)
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-W4966.B.WO.HC  
WOSSNER PISTON KIT 8946DB High Compression 14.4:1