This Wossner piston kit is designed for high-performance applications, offering superior strength and heat transfer properties for Honda CRF150R models from 2012 to 2018. Made in Germany, this forged piston features an elliptical design for even pressure distribution and enhanced durability under thermal expansion conditions.

Features

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  Forged piston construction for superior strength and reliability

  
  


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  Optimised combustion chamber heat transfer to cylinder walls

  
  


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  Elliptical profile for uniform bearing surface under heat expansion

  
  


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  Reduced risk of piston collapse through even thrust load distribution

  
  


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  Manufactured in Germany

  
  

Specifications

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  Part Number: 56-W921.A.WO

  
  


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  Bore Size: 66mm

  
  


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  Actual Size: 65.95mm

  
  


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  Size: 66.95mm

  
  


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  Display Displacement: 149 cm³

  
  


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  Stroke: 43.80 mm

  
  


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  Clearance: 0.05 mm

  
  


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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: 20.60 mm

  
  


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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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  13101-KSE-A70

  
  

Vehicle Fitments

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  Honda CRF150R 2012–2018 (Pro Series)