Wossner forged piston kit 8161DA is a standard size piston (STD) for Honda CR250R models from 1997 to 2001, featuring a 67.40 mm bore and a 66.34 mm actual piston diameter. Specifically designed as a 1-ring configuration, this German-engineered piston provides high durability and efficient thermal performance through its forged structure and elliptical design.

Features

• 
  

  Forged construction for enhanced durability and strength

  
  


• 
  

  Elliptical profile ensures uniform pressure distribution during thermal expansion

  
  


• 
  

  Efficient heat transfer from the combustion chamber to the cylinder walls

  
  


• 
  

  Made in Germany for precision and reliability

  
  

Specifications

• 
  

  Bore Size: 67.40 mm

  
  


• 
  

  Actual Piston Diameter: 66.34 mm

  
  


• 
  

  Display (Displacement): 290 cm³

  
  


• 
  

  Stroke: 72.00 mm

  
  


• 
  

  Clearance: 0.06 mm

  
  


• 
  

  Compression Ratio: 2-stroke (Wossner and OEM)

  
  


• 
  

  Compression Height: 38.00 mm

  
  

Cross-Reference OEM Part Numbers

• 
  

  Honda OEM: 13101-KZ3-L10

  
  


• 
  

  Wiseco: 768M6640

  
  

Cross-Reference Component Part Numbers

• 
  

  Piston Kit: 8161DA

  
  


• 
  

  Lock: CW18

  
  


• 
  

  Pin: WP033

  
  


• 
  

  Ring Set: RSB6640

  
  


• 
  

  Rod: P2021

  
  

Vehicle Fitments

• 
  

  1997 Honda CR250R (1-ring)

  
  


• 
  

  1998 Honda CR250R (1-ring)

  
  


• 
  

  1999 Honda CR250R (1-ring)

  
  


• 
  

  2000 Honda CR250R (1-ring)

  
  


• 
  

  2001 Honda CR250R (1-ring)