This Wossner forged piston kit features a 64.75mm bore (64.69mm actual) and is designed for use in various Yamaha two-stroke models, including the YFZ350 Banshee, RD350 variants, and the RZ350. Manufactured in Germany, the piston is engineered for high durability and thermal performance. Its elliptical design ensures even load distribution during operation, reducing localised stress and the risk of piston collapse.

Features

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  Forged piston construction for high strength and performance

  
  


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  Engineered for efficient combustion heat transfer

  
  


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  Elliptical profile ensures consistent pressure distribution under expansion

  
  


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  Made in Germany

  
  

Specifications

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  Bore size: 64.75mm (64.69mm)

  
  


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  Display volume: 347 cm³

  
  


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  Stroke: 54.00 mm

  
  


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  Clearance: 0.06 mm

  
  


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  Compression height: 36.00 mm

  
  


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  Compression ratio: 2-stroke (Wossner and OEM)

  
  

Cross-Reference OEM Part Numbers

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  Piston: 8075D075

  
  


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  Lock: CW16

  
  


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  Pin: WP027

  
  


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  Ring Set: RSB6475 x 2

  
  

Vehicle Fitments

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  Yamaha YFZ350 Banshee 1987–2007

  
  


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  Yamaha RD350 LC - YPVS 1980–1987

  
  


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  Yamaha RD350 AC 1950–2014

  
  


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  Yamaha RZ350 1982–1990

  
  


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  Yamaha RD350 1973–1975