Wossner Piston Kit 8188D050 is a high-quality forged piston specifically designed for Yamaha YZ80 motorcycles from 1993 to 2001, featuring a 47.50mm bore (+0.50 US Bore). Manufactured in Germany, this piston ensures optimal heat transfer and strength, while its elliptical design evenly distributes thrust forces, minimising stress and the risk of piston failure.

Features

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  Forged piston for enhanced mechanical strength and longevity

  
  


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  Elliptical shape provides uniform load distribution under heat expansion

  
  


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  Efficient combustion heat transfer to cylinder walls

  
  


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  German-made for high manufacturing precision

  
  

Specifications

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  Bore: 47.50 mm

  
  


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  Actual Piston Diameter: 47.45 mm

  
  


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  Stroke: 47.80 mm

  
  


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  Displacement: 82 cm³

  
  


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  Clearance: 0.05 mm

  
  


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  Compression Height: 26.00 mm

  
  


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  Wossner Compression Ratio: 2-stroke

  
  


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  OEM Compression Ratio: 2-stroke

  
  

Cross-Reference OEM Part Numbers

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  Wossner Piston: 8188D050

  
  


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  Lock: CW14

  
  


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  Pin: WP058

  
  


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  Ring Set: RSB4750

  
  


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  Rod: P2008

  
  


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  Internal Part No: 56-W646+00050.WO

  
  

Vehicle Fitments

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  1993 Yamaha YZ80

  
  


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  1994 Yamaha YZ80

  
  


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  1995 Yamaha YZ80

  
  


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  1996 Yamaha YZ80

  
  


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  1997 Yamaha YZ80

  
  


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  1998 Yamaha YZ80

  
  


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  1999 Yamaha YZ80

  
  


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  2000 Yamaha YZ80

  
  


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  2001 Yamaha YZ80