This Wossner forged piston kit with a 101mm bore (actual 100.96mm) is designed for BMW R1200 models from 2005 to 2009, including GS, S, ST, RT, and R variants. With a high OEM compression ratio of 12.0:1 and reduced dome volume for optimised combustion, this set of two pistons is engineered for reliability and thermal efficiency.

Features

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  Forged construction ensures high strength and performance

  
  


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  Designed for efficient heat dissipation to the cylinder walls

  
  


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  Elliptical shape provides consistent surface contact under thermal expansion

  
  


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  Made in Germany

  
  

Specifications

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  Bore Size: 101mm (actual 100.96mm)

  
  


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  Stroke: 73.00 mm

  
  


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  Clearance: 0.04 mm

  
  


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  Display Displacement: 1085 cm³

  
  


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  Wossner Compression Ratio: OEM

  
  


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  OEM Compression Ratio: 12.00:1

  
  


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  Dome Volume: -3.40 cm³

  
  


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  Compression Height: 30.90 mm

  
  

Vehicle Fitments

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  BMW R1200GS 2005–2009

  
  


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  BMW R1200S 2009

  
  


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  BMW R1200ST 2005–2009

  
  


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  BMW R1200RT 2005–2009

  
  


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  BMW R1200R 2005–2009