2-stroke cast piston for Athena big bore cylinderHigh resistance to mechanical thermal stressesMade with cutting edge CNC machining tools that ensures dimensional tolerances of less than 0.01 mmHas been tested on engine dynamometer benches under progressive stress load, and thereafter on track to validate it performance even in the most extreme conditionsThe rings adapt to the cylinder liner even at low tangential loadKit includes cast piston, wrist pin, circlips and piston rings