ATHENA Piston Kit - 53.94 mm - Yamaha YZ125 S4F05400011A

Piston Kit - 53.94 mm - Yamaha YZ125
High resistance to mechanical and thermal stresses, 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, Equipped with piston rings that guarantee less friction with the OE cylinder producing a higher performance, Made by reverse extrusion, For OE cylinder.