Wossner forged piston kit 8861DA is a standard-size piston with a 66mm bore (measured at 65.95mm) designed for Honda CRF150R models from 2012 to 2018. Featuring a hard Teflon skirt coating and advanced thermal engineering, this piston offers a reliable fit, excellent durability, and consistent performance. Manufactured in Germany, it is optimised for OEM compatibility.

Features

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  Forged construction ensures superior strength and longevity

  
  


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  Elliptical profile provides uniform bearing surface under heat expansion

  
  


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  Enhanced heat transfer from combustion chamber to cylinder walls

  
  


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  Teflon skirt coating for optimal fit and conformity to cylinder bore

  
  


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  Reduces localised pressure to prevent piston collapse

  
  


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  Made in Germany

  
  

Specifications

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  Bore: 66mm (Measured: 65.95mm)

  
  


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  Display Volume: 149 cm³

  
  


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  Stroke: 43.80mm

  
  


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  Clearance: 0.05mm

  
  


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  Compression Height: 20.60mm

  
  


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  Wossner Compression Ratio: OEM

  
  


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  OEM Compression Ratio: 11.70:1

  
  


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  Dome Volume: -1.40 cm³

  
  


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  Part No.: 56-W914.A.WO (Wossner 8861DA)

  
  


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  Ring Set: 660XKS

  
  


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  Lock P/N: CW14

  
  


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  Pin P/N: WP058

  
  

Cross-Reference OEM Part Numbers

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  13101-KSE-A70

  
  

Vehicle Fitments

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  2012 Honda CRF150R

  
  


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  2013 Honda CRF150R

  
  


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  2014 Honda CRF150R

  
  


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  2015 Honda CRF150R

  
  


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  2016 Honda CRF150R

  
  


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  2017 Honda CRF150R

  
  


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  2018 Honda CRF150R