WOSSNER PISTON KIT YAM XS650 76.50, WOSSNER K8818D150-2 680cc

Piston kit 76.50mm Bore 76.44 Wossner SET/4 K8818D150-2 (+1.50mm) YAMAHA
XS650 1974 - 1981, 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-W9899.150.WO (oro2u.com)
YAMAHA XS650 1974-1981,
WOSSNER PISTON KIT K8818D150-2 O/S +1.50 BORE 76.50mm

Cross reference numbers ONLY.
Clips. CW20,
Pin. WP068,
Rings. 765XDS Display (cm3) 679 / 688
Hub stroke (mm) 74.00
Clearance (mm) 0.06
Wossner compression Ratio: OEM
OEM Compression ratio: 8.40:1
Dome volume (cm3) +23.40
Compression height (mm) 29.00
Theorectical weight (G)