PISTON KIT 80-82 YZ IT465 87.0, WOSSNER 8265D200 YAMAHA

This Wossner piston kit features an 87mm bore size (86.92mm actual) and is designed for Yamaha YZ465 (1981–1982) and IT465 (1980–1981) models. Made in Germany, this forged piston offers superior strength and efficient heat transfer. Its elliptical profile helps distribute thrust loads evenly during heat expansion, reducing localised pressure and minimising the risk of piston collapse.

Features

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  Forged construction for increased structural strength

  
  


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  Elliptical design distributes loads evenly during thermal expansion

  
  


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  Promotes effective heat transfer from combustion chamber to cylinder walls

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 87mm (86.92mm)

  
  


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  Display: 465 cm³

  
  


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  Stroke: 82.00 mm

  
  


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  Clearance: 0.08 mm

  
  


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  Compression Height: 40.00 mm

  
  


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  Compression Ratio: 2-stroke (Wossner and OEM)

  
  

Cross-Reference OEM Part Numbers

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  Piston Kit: 8265D200

  
  


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  Lock: CW18

  
  


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  Pin: WP042

  
  


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  Ring Set: RSC8700 x2

  
  


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  Part No.: 56-W551_2.00.WO

  
  

Vehicle Fitments

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  Yamaha YZ465 1981

  
  


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  Yamaha YZ465 1982

  
  


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  Yamaha IT465 1980

  
  


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  Yamaha IT465 1981