Piston Kit Details:

• Piston Kit: Wossner 8550DB (+0.01)


• Bore: 91.50mm


• Wossner Part Number: 8550DB

Husqvarna Models:

• TC 400 1999 - 2001


• SMR400 2005 - 2007

Wossner Piston Features:

• 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.

Additional Part Information:

• PART NO.: 56-W104.B (oro2u.com)


• Wossner Piston Part Number: 8550DB


• Lock Part Number: CW20


• Pin Part Number: WP038


• Ring Set Part Number: 915XSY

Technical Specifications:

• Displacement (cm3): 399


• Hub Stroke (mm): 60.80


• Clearance (mm): 0.06


• Wossner Compression Ratio: OEM


• OEM Compression Ratio: 11.40:1


• Dome Volume (cm3): +1.90


• Compression Height (mm): 24.50