Rotax Evo Piston Assembly

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Piston and ring assembly for Rotax Evo kart engines. Available in several sizes to accommodate wear and rebuild process of the engines. Ideal for the Rotax FR125 Evo engine. Comes as a complete assembly including the piston and ring, installed. 

The Rotax Evo piston is available in multiple sizes. As an engine runs in, the cylinder wall is eroded slightly. Rebuild processes tend to open the diameter of the cylinder. Therefore, in order to retain performance, a larger piston must be used. 

Available Piston Sizes:
  • 53.97mm (Standard from factory)
  • 53.98mm
  • 53.99mm
  • 54.00mm

Note: Unless you are utilizing the Rotax Evo engine (or Pre-Evo) for non-competition use, Rotax regulations in the United States and world wide require major engine services such as rebuilds or replacing a piston to be conducted by an authorized service center. Please consult your local racing series and relevant technical regulations prior to conducting a piston replacement yourself to prevent non-compliance. 

The Rotax Evo piston and ring assembly is noted as P/N 296297, 296294, 269298, 269299 on Rotax technical diagrams.