PISTON KIT 99-18 YZ250 1-RING, WOSSNER 8217DA 66.40 A

Piston kit 66.40mm Bore 66.35 Wossner 8217DA (STD)

YAMAHA
YZ250 1999 - 2018, (Single ring)

• 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-W742.A.WO.1R (oro2u.com)
Wossner Piston Kit 8217DA SINGLE RING PISTON Yamaha YZ250 1999-2018 66.4mm Bore.
Gasket P/N D2041
Lock P/N CW18
Pin P/N WP033
Ring Set P/N RSB6640
Rod P/N P2028

Display (cm3) 249
Hub stroke (mm) 68.00
Clearance (mm) 0.05
Wossner compression Ratio: 2 stroke
OEM Compression ratio: 2 stroke
Dome volume (cm3)
Compression height (mm) 38.00
Theorectical weight (G)

Cross reference numbers ONLY. OLD No. 56-W056.WO.A