WOSSNER PISTON KIT 05-07 YZF250 77.00, WOSSNER 8612DB 2-RING

Piston kit 77.01mm Bore 76.97 Wossner 8612DB (+0.01) YAMAHA
WR250F 2005-2007,
YZF250F 2005-2007,
GAS GAS
EC250F 2010 - 2015,
(2 Rings)
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-W188.B.WO (oro2u.com)
Wossner Piston Yamaha YZ250F/WR250F 77 mm Bore (PN# 8612DB)
Lock P/N CW16
Pin P/N WP059
Ring Set P/N 770XAS Display (cm3) 249
Hub stroke (mm) 53.6
Clearance (mm) 0.04
Wossner compression Ratio: OEM
OEM Compression ratio: 12.50:1
Dome volume (cm3) -2.80
Compression height (mm) 22.20
Theorectical weight (G)