PISTON KIT 05-07 YZF250 77.00, WOSSNER 8612DA 2-RING, 5NL-11631-20-00

Piston kit 77mm Bore 76.96 Wossner 8612DA STD)

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.A.WO oro2u.com)
Wossner Piston Yamaha YZ250F/WR250F 77 mm Bore (PN# 8612DA)
Lock P/N CW16
Pin P/N WP059
Ring Set P/N 770XAS - 2

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)

Cross reference numbers ONLY.
5NL-11631-20-00, 5XC-11631-00-00