Athena Generic XOR Competition 50 Cast Piston Bore 40mm (For OE Cylinder)

If you're rebuilding the top end of your off-road 4-stroke engine, a reliable piston is key. This Athena cast piston is built to match the original equipment (OE) cylinder specifications, meaning it's designed to fit right in and work with your existing setup. It's a well-built component that aims to give you the same dependability you expect from your stock parts, but with some added benefits.

Athena uses advanced CNC machining to hold very tight tolerances, down to less than 0.01 mm. This precision helps ensure a good seal and smooth operation. The piston itself is made from special alloys that include nickel, silica, and aluminum, chosen for their strength and ability to handle the heat and pressure of off-road use. Some versions of these pistons also get a molybdenum disulfide coating on the skirt, which is applied through screen printing. This treatment is there to cut down on friction, helping to improve both how long the piston lasts and its overall performance.

This piston is intended to work with your original cylinder, making it a straightforward replacement part for many off-road applications. It's a solid option if you're looking for a dependable piston that offers improved resistance and performance over a standard replacement.