WOSSNER PISTON KIT/4 YAM YZF1000 77.00, WOSSNER K8752DA-4 COMP 13:1

Piston kit 77mm Bore 76.96 Wossner K8752DA-4 (STD)
YAMAHA
R1 - YZF1000 2004 - 2006, 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-W9876.000.WO (oro2u.com)
YAMAHA YZF R6 2006-2011 4 Stroke, Comp. 13:1
WOSSNER FORGED PISTON K8752DA-4 Bore
Clip part no - CW17
Piston pin- WP0111
Ring set -770XAS-2 Display (cm3) 998 / 1023
Hub stroke (mm) 53.60
Clearance (mm) 0.04
Wossner compression Ratio: 13.50:1
OEM Compression ratio: 12.50:1
Dome volume (cm3)   -4.70
Compression height (mm) 22.80
Theorectical weight (G)