PISTON KIT YFM400FW 00-06, FORGED WOSSNER 8901DA 5GH-11631-00-00

YAMAHA
YFM400FW KODIAK 2000 - 2006,
YFM4 GRIZZLY 400 2007 - 2008,

• 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-W9924.00A.WO (phoenixmotos.com)
YAMAHA YFM 400FW KODIAK 2000-2006, YAMAHA YFM 400 GRIZZLY 2007-2008,
WOSSNER 8901DA 84.82mm PISTON KIT

Clips P/N CW20
Pin P/N WP052
Ring Set P/N 845XSY

Display (cm3) 400
Hub stroke (mm) 70.50
Clearance (mm) 0.08
Wossner compression Ratio: 8.50:1
OEM Compression ratio: 10.50:1
Dome volume (cm3) -2.90
Compression height (mm) 26.90
Theorectical weight (G)

Cross reference numbers ONLY.
5GH-11631-00-00, 40076M08450,