This Wossner forged piston kit with a 75mm nominal bore (actual 74.93mm) is specifically designed for ROTAX SWM250 models from 1979 to 1982. Built for two-stroke engines, it combines advanced metallurgy with precision engineering for enhanced durability and thermal efficiency.

Features

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  Forged construction delivers superior strength and resistance to deformation under high stress

  
  


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  Optimised for efficient heat dissipation from combustion chamber to cylinder walls

  
  


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  Elliptical skirt profile promotes uniform surface contact and load distribution

  
  


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  German-made for high precision and quality

  
  

Specifications

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  Bore Size: 75.00mm (actual 74.93mm)

  
  


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  Stroke: 57.50 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Wossner Compression Ratio: 2 stroke

  
  


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  OEM Compression Ratio: 2 stroke

  
  


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  Compression Height: 34.00 mm

  
  


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  Lock Part Number: CW18

  
  


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  Pin Part Number: WP033

  
  


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  Ring Set Part Number: RDC7500

  
  

Vehicle Fitments

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  ROTAX SWM250 1979–1982