ATHENA Piston Kit - 57.94 mm - Yamaha S4C05800003A

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