Piston kit 77.02mm Bore 76.98 Wossner 8772DC (+0.02) Yamaha
WR 250 X 2008 - 2009, 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-W239.C.WO
Wossner Piston Yamaha WR250X (PN# 8772DC) (Pro series)
Lock P/N CW17
Pin P/N WP083
Ring Set P/N 770XAS-2 Display (cm3) 249
Hub stroke (mm) 53.60
Clearance (mm) 0.04
Wossner compression Ratio: 13.50:1
OEM Compression ratio: 11.80:1
Dome volume (cm3) -4.50
Compression height (mm) 22.20
Theorectical weight (G)