Wossner Forged Piston Kit 67.50mm Bore – Honda CR250R (1986–1996)

This Wossner forged piston kit is designed for Honda CR250R models manufactured between 1986 and 1996. With a bore size of 67.50 mm and a piston diameter of 67.44 mm (+1.10 mm oversize), it is suited for heavily overbored or re-sleeved cylinders. The forged construction ensures high strength and durability, while the elliptical design provides consistent thrust load distribution and reduces the risk of piston failure. Precision manufactured in Germany for dependable performance.

Features

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  Forged piston construction for maximum strength and longevity

  
  


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  Engineered to facilitate efficient heat transfer to the cylinder walls

  
  


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  Elliptical design ensures uniform bearing surface and reduced localised stress

  
  


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  Manufactured in Germany to strict tolerance standards

  
  

Specifications

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  Bore Size: 67.50 mm

  
  


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  Piston Diameter: 67.44 mm

  
  


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  Engine Displacement: 249 cm³

  
  


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  Stroke: 72.00 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression Height: 38.00 mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  

Cross-Reference Wossner Part Numbers

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  Piston Kit: 8021D110

  
  


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  Lock: CW18

  
  


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  Pin: WP033

  
  


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  Ring Set: RSB6750 x 2

  
  

Vehicle Fitments

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  1986–1996 Honda CR250R