ATHENA TOP END PISTON KIT; YAMAHA 65 YZ 18-23

Give your 2-stroke engine the ultimate refresh with this perfectly tuned, all-in-one top-end rebuild kit. Combining a high-performance cast aluminum piston with Athena's legendary top-end gaskets, this package takes the guesswork out of your engine maintenance. The piston is gravity-cast from a premium, high-silicon aluminum alloy and CNC-machined for a flawless profile, ensuring optimal flow and perfect flame propagation. Meanwhile, the included gaskets undergo advanced surface treatments and stress-relieving processes for an unbeatable seal under extreme cylinder pressures. Restore your lost compression, reduce internal friction, and get back to dominating the dirt with race-ready reliability straight out of the box. Complete top-end solution combines a cast 2-stroke piston and gasket kit for a perfectly tuned rebuildManufactured from high-performance, high-silicon aluminum alloy for exceptional strength and heat resistanceMolybdenum disulfide skirt coating drastically reduces friction and internal engine wearPrecision CNC-machined profile ensures smooth flow and optimal flame propagationAdvanced top-end gaskets feature proprietary surface treatments for maximum sealing reliabilityIncludes: Cast 2-Stroke Piston (Domed Head)Piston Ring (1)Biconical Piston PinComplete Top End Gasket KitPiston Size: 43.45mm (B-Size)Pin Dimensions: 12x35x8mmCompression Height: 24.0mm.