Wossner Forged Piston Kit 55.00mm Bore – Honda CR125 (1990–1991)

This Wossner forged piston kit is specifically designed for Honda CR125 motorcycles from 1990 to 1991. With a 55.00 mm bore and a piston diameter of 54.94 mm, this +1.00 oversise piston is crafted for high-performance 2-stroke engines. Its forged construction enhances structural strength and thermal reliability, while the elliptical design ensures uniform load distribution during operation. Manufactured in Germany to precision standards.

Features

• 
  

  Forged piston for maximum strength and durability

  
  


• 
  

  Optimised heat transfer from combustion chamber to cylinder walls

  
  


• 
  

  Elliptical design ensures balanced thrust load distribution and reduces localised pressure

  
  


• 
  

  Precision-made in Germany

  
  

Specifications

• 
  

  Bore Size: 55.00 mm

  
  


• 
  

  Piston Diameter: 54.94 mm

  
  


• 
  

  Engine Displacement: 125 cm³

  
  


• 
  

  Stroke: 54.50 mm

  
  


• 
  

  Clearance: 0.06 mm

  
  


• 
  

  Compression Height: 28.00 mm

  
  


• 
  

  Compression Ratio: 2-stroke (Wossner and OEM)

  
  

Cross-Reference OEM Part Numbers

• 
  

  Piston Kit: 8107D100

  
  


• 
  

  Lock: CW15

  
  


• 
  

  Pin: WP032

  
  


• 
  

  Ring Set: RSB5500

  
  


• 
  

  Rod: P2009

  
  

Vehicle Fitments

• 
  

  Honda CR125 (1990–1991)