Wossner Piston Kit 8188D100 is a forged performance piston engineered for Yamaha YZ80 models from 1993 to 2001, featuring a 48.00mm bore (+1.00 US Bore). Designed and manufactured in Germany, it offers enhanced strength and optimal thermal efficiency. Its elliptical design helps distribute thrust loads uniformly under thermal expansion, minimising localised pressure and preventing piston collapse.

Features

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  Forged piston construction for increased durability and performance

  
  


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  Elliptical geometry ensures even load distribution under heat stress

  
  


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  Maximised heat transfer from combustion chamber to cylinder wall

  
  


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  Precision manufacturing in Germany

  
  

Specifications

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  Bore: 48.00 mm

  
  


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  Actual Piston Diameter: 47.95 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: 8188D100

  
  


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  Lock: CW14

  
  


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  Pin: WP058

  
  


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  Ring Set: RSB4800

  
  


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  Rod: P2008

  
  


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  Internal Part No: 56-W646+100.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