Wossner Piston Kit to fit the following bikes:

Gas Gas Pro 250cc – 2002 onward
TRS One / RR & Gold – 2016 onward
Vertigo 250 – 2017 onward

This is a full kit which contains a piston, rings, clips and gudgeon pin.

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.

Lock P/N CA18
Pin P/N WP033
Ring Set P/N RSB7250 X 2

Displacement 247cm3
Stroke 60.0mm

Clearance:
Cylinder Bore Size 72.50mm
Size A 72.46mm
Size B 72.47mm
Size C 72.48mm

Compression Height 28.75mm
Weight 204.00g (Approximately)

The ‘A’ size kit, which is to suit the standard bore is available from stock. If you need a ‘B’ or ‘C’ size we can order this for you.