ATHENA TOP END PISTON KIT; YAMAHA 85 YZ 02-18

Breathe new life into your 85cc 2-stroke engine with this ultimate, all-in-one top-end rebuild kit. Athena has perfectly paired a premium, gravity-cast high-silicon aluminum piston with their industry-leading top-end gaskets for a seamless and highly reliable rebuild. The precision CNC-machined piston ensures flawless fuel flow and optimal flame propagation, while a specialized molybdenum disulfide skirt coating greatly reduces internal friction for enhanced power and longevity. Accompanied by gaskets that have undergone advanced stress-relieving processes and proprietary surface treatments, this kit guarantees an unbeatable seal under extreme cylinder pressures. Reclaim your factory compression and hit the track with maximum performance. Complete top-end solution perfectly pairing a cast 2-stroke piston and comprehensive gasket kitGravity-cast from a specialized high-silicon aluminum alloy for exceptional strength and heat resistanceMolybdenum disulfide skirt coating drastically reduces friction and internal engine wearPrecision CNC-machined profile ensures optimal fuel flow and perfect flame propagationAdvanced gaskets feature proprietary surface treatments and stress-relieving processes for maximum sealing reliabilityIncludes: Cast 2-Stroke Piston (Domed Head)Piston Ring (1)Biconical Piston Pin / Wrist PinCirclipsNeedle BearingComplete Top End Gasket KitDisplacement: 85ccPiston Size: 47.45mm (B-Size)Pin Dimensions: 14 x 9 x 39mmCompression: Standard.