This Wossner forged piston kit features a 65.50mm bore (actual 65.44mm) and is a +2.00mm oversize replacement designed for KTM 175 GS and MC models produced from 1977 to 1982. Developed for two-stroke engines, it combines strength, precision, and advanced thermal properties. The elliptical geometry improves pressure distribution during thermal expansion, enhancing reliability under performance conditions.

Features

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  Forged piston ensures structural integrity and optimal heat dissipation

  
  


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  Elliptical profile minimises localised pressure and enhances load distribution

  
  


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  Precision-manufactured in Germany for two-stroke engine applications

  
  

Specifications

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  Bore Size: 65.50mm (actual 65.44mm)

  
  


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  Stroke: 54.00 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression Ratio (Wossner): 2-stroke

  
  


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  Compression Ratio (OEM): 12-stroke

  
  


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  Compression Height: 37.00 mm

  
  


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  Lock Part Number: CW15

  
  


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  Pin Part Number: WP011

  
  


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  Ring Set Part Number: RSB6550

  
  

Cross-Reference OEM Part Numbers

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  56-W967.200.WO

  
  

Vehicle Fitments

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  KTM 175 GS (1977–1982)

  
  


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  KTM 175 MC (1977–1982)