Athena – Piston Kit – 57.94 mm – Yamaha

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