Piston kit 88.00mm     Wossner 8317D100  

YAMAHA
YZ490 1984 - 1990,
WR500 1992 - 1993,

• 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 anddistributing thrust loads more evenly, thereby preventing piston collapse.
• Made in Germany

Part No. 56-W4815.100.WO