WOSSNER PISTON KIT 80-82 YZ250 71.50, FORGED WOSSNER 8180D150

Piston Kit 71.50mm Bore 71.44 WOSSNER 8180D150 (+1.50)
YAMAHA
YZ250 1980-1982,
IT250 1981-1982, 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-W452+150.WO (oro2u.com)
Lock P/N CW18
Pin P/N WP033
Ring Set P/N RSB7150 x 2 Display (cm3) 246
Hub stroke (mm) 64.00
Clearance (mm) 0.06
Wossner compression Ratio: 2 stroke
OEM Compression ratio: 2 stroke
Dome volume (cm3)
Compression height (mm) 33.00
Theorectical weight (G)
Cross Reference Numbers Only:
Piston Kit Std (Std) 5X5-11630-00-00,
Piston Std (Std) 5X5-11631-00-94,  
Piston Ringset Std (Std) 5X5-11601-00-00,
Pin, Piston 214-11633-00-00,
Circlip 93450-19052-00,
1980 Yamaha YZ 250
1981 Yamaha IT 250
1981 Yamaha YZ 250
1982 Yamaha IT 250
1982 Yamaha YZ 250