PISTON KIT 92-98 YZ250 69.00, WOSSNER 8023D100 YAMAHA MXPiston kit 69mm Bore 68. 94 Wossner 8023D100 (+1. 00) YAMAHA YZ250 1992 1998, WR250 1992 1999, 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

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Designed to handle the demands of both professional technicians and enthusiasts