PISTON KIT 77-78 YZ400 86.00, WOSSNER 8264D100 YAMAHA MX, 77-78 IT400

YAMAHA
YZ400 1977 - 1978,
IT425 1977 - 1978,

• 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-W550_1.00.WO (phoenixmotos.com)
Wossner Piston Yamaha YZ400 86 mm Bore (PN# 8264D100)
1977 Yamaha IT 425 1977 Yamaha YZ 400 1978 Yamaha IT 425 1978 Yamaha YZ 400
Lock P/N CW18
Pin P/N WP042
Ring Set P/N RSC8600 x 2
Piston size 85.92mm

Display (cm3) 398
Hub stroke (mm) 82.00
Clearance (mm) 0.08
Wossner compression Ratio: 2 stroke
OEM Compression ratio: 2 stroke
Dome volume (cm3)
Compression height (mm) 40.00
Theorectical weight (G)