This Wossner forged piston kit is engineered for high-performance applications and fits Honda CRF150R Pro Series models from 2012 to 2018. With a precise 66.02mm bore size and a high-strength forged construction, this piston is designed for durability and efficient heat transfer under demanding conditions.

Features

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  Forged piston construction for enhanced strength and durability

  
  


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  Elliptical design ensures uniform bearing surface under heat expansion

  
  


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  Optimised for superior heat dissipation from combustion chamber to cylinder walls

  
  


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  Designed to prevent localised pressure and piston collapse

  
  


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  Manufactured in Germany

  
  

Specifications

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  Bore Size: 66.02mm

  
  


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  Actual Piston Size: 65.97mm

  
  


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  Display Displacement: 149 cm³

  
  


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  Stroke: 43.80mm

  
  


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  Piston Clearance: 0.05mm

  
  


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  Wossner Compression Ratio: 12.20:1

  
  


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  OEM Compression Ratio: 111.70:1

  
  


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  Dome Volume: -0.80 cm³

  
  


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  Compression Height: 20.60mm

  
  


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  Lock Part Number: CW14

  
  


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  Pin Part Number: WP058

  
  


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  Ring Set Part Number: 660XKS

  
  

Cross-Reference OEM Part Numbers

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  Part No: 56-W921.C.WO

  
  

Vehicle Fitments

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  Honda CRF150R (2012–2018), Pro Series