Athena Piston Kit - S4F05400011A Yamaha YZ 125 1997-2004 custom dynamics 44 mm Piston Material Forged

44 mm Piston Material Forged Stroke Length 70

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Type Helmet Units Each Color/Finish Black Product Name Headset Riding Style Street

Riding Style Street Mounting Position Rear Type Standard Color/Finish Silver Product Name Brake Line Units Kit Features Standard Material Steel Number of Lines 1

Athena Piston Kit - S4F05400011A Yamaha YZ 125 1997-2004 custom dynamics 44 mm Piston Material ForgedFeatures 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. Specs Piston Material 4032 Aluminum Alloy Riding Style Off Road Bore Size 53. 94