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WOSSNER PISTON YAM PW50 81> 40.95MM +1.00MM O/S #WO8267D100

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Wossner is Germany's finest aftermarket forged piston and rod manufacturer and have over 25 years of experience in the high-performance racing industry. Top European racers and FIM World Champions rely on Wossner for only the best pistons, rods and customer service.


  • In-house designed and manufactured; all forgings are produced in Wossner's company-owned forging operation
  • 4-stroke pistons are made using a double-bridged forging design
  • Lightweight pistons with the tightest piston-wall clearances in the industry give you a quieter running engine
  • All pistons include piston, ring, wrist pin and pin locks
  • Wossner pistons are used by leading Supercross, Arenacross and MX GP teams
  • Made in Germany


  • Piston Size: 40.95mm
  • Oversize: +1.00mm
  • Number of Rings: 1
  • Replacement Rings: RSB4100
  • Replacement Wrist Pin: WP105
  • Replacement Circlip: CW10

NOTE: Wossner Piston Kits include the Piston, Wrist Pin, Circlips & Rings, Needle Bearings are not included.

|Fitment| We are happy to confirm if this will fit. Guides require us to know the Year, Make, Model, Submodel (if there is one) and CC. If you could provide that info we would appreciate it.