PISTON KIT 90-91 KX250 68.50, WOSSNER 8109D110 KAWASAKI MX

Wossner Forged Piston Kit 68.50mm Bore – Kawasaki KX250 / KDX250 (1990–1994)

This Wossner forged piston kit is made for Kawasaki KX250 and KDX250 models produced between 1990 and 1994. With a bore size of 68.50 mm and a piston diameter of 68.44 mm (+1.10 mm oversize), it is designed for overbored or re-sleeved cylinders. The piston’s forged construction ensures enhanced durability, while its elliptical shape promotes even pressure distribution under thermal expansion. Precision-manufactured in Germany for high-performance reliability.

Features

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  Forged piston for maximum strength and extended durability

  
  


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  Optimised combustion heat transfer to maintain cylinder integrity

  
  


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  Elliptical geometry provides consistent load distribution and minimises piston wear

  
  


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  Manufactured in Germany for precision and consistency

  
  

Specifications

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  Bore Size: 68.50 mm

  
  


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  Piston Diameter: 68.44 mm

  
  


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  Engine Displacement: 250 cm³

  
  


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  Stroke: 70.00 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression Height: 37.00 mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  

Cross-Reference Wossner Part Numbers

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  Piston Kit: 8109D110

  
  


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  Lock: CW18

  
  


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  Pin: WP033

  
  


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  Ring Set: RSB6850

  
  


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  Rod: P2022

  
  

Vehicle Fitments

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  1990 Kawasaki KX250

  
  


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  1991 Kawasaki KX250

  
  


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  1991 Kawasaki KDX250

  
  


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  1992 Kawasaki KDX250

  
  


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  1993 Kawasaki KDX250

  
  


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  1994 Kawasaki KDX250