WOSSNER PISTON KIT 82-84 YZ490 87.50mm, FORGED WOSSNER 8266D050

Piston kit 87.50mm Bore 87.42 Wossner 8266D050 (+0.50)
YAMAHA
YZ490 1982 - 1983,
IT490 1983 - 1984,
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-W477+050.WO (oro2u.com)
Wossner Piston Kit 8266D050 Piston Size: 86.92mm
Lock P/N CW18
Pin P/N WP042
Ring Set P/N RSC8750 x 2 Display (cm3) 465
Hub stroke (mm) 82.00
Clearance (mm) 0.08
Wossner compression Ratio: 2 stroke
OEM Compression ratio: 2 stroke
Dome volume (cm3)
Compression height (mm) 40.00
Theorectical weight (G)