S4C06800001B - Athena Big Bore Piston Kit For Yamaha YFZ350 1987-2006 Size B

Features: 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.