This Wossner forged piston kit with a 55.75mm bore is an oversized (+2.00mm) replacement for the Sachs 125/7 engine. Precision-forged in Germany, it is engineered for strength, thermal efficiency, and longevity. The elliptical piston profile promotes even expansion and load distribution, reducing localised stress and preventing failure under two-stroke operating conditions.

Features

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  Forged construction for high durability and performance

  
  


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  Optimised for efficient heat transfer from combustion to cylinder walls

  
  


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  Elliptical design provides uniform bearing surface under thermal expansion

  
  


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  Even thrust load distribution minimises localised pressure points

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore: 55.75mm (+2.00mm Oversize)

  
  


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  Actual bore: 55.69mm

  
  


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  Display volume: 122 cm³

  
  


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  Stroke: 54.00mm

  
  


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  Clearance: 0.06mm

  
  


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  Wossner compression ratio: 2-stroke

  
  


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  OEM compression ratio: 2-stroke

  
  


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  Compression height: 38.00mm

  
  

Cross-Reference OEM Part Numbers

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  56-W9844.200

  
  


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  8287D200

  
  


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  Clip Part Number: CW16

  
  


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  Pin Part Number: WP136

  
  


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  Ring Set Part Number: RSB5575 (x2)

  
  

Vehicle Fitments

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  Sachs 125/7