WOSSNER PISTON KIT 05-07 YZF250 77mm, WOSSNER 8614DC 3-RING

Piston kit 77.02mm Bore 76.98 Wossner 8614DC (+0.02) YAMAHA
WR250F 2005-2007,
YZF250F 2005-2007,
GAS GAS
EC250F 2010 - 2015,
(3 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-W189+00C.WO (oro2u.com)
Wossner Piston Yamaha YZF250/WR250F 77 mm Bore (PN# 8614DC)
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) -4.50
Compression height (mm) 22.20
Theorectical weight (G)