Athena 97-21 Yamaha YZ 125 57.94mm Bore 2T Cast Piston

This Athena cast piston is built with a special alloy of nickel, silica, and aluminum, ensuring it meets the same reliability standards as your original equipment piston while offering greater resistance and excellent performance for your Yamaha YZ 125. The precise 57.94mm bore is achieved through advanced CNC machining, holding dimensional tolerances to less than 0.01 mm for a consistent fit and operation.

The smooth profile of this piston aids in regular fuel flow and proper flame propagation, contributing to efficient combustion. For select pistons, a molybdenum disulfide coating is applied to the skirt via screen printing. This treatment further reduces friction, which can enhance both the performance and the overall durability of the piston during demanding use.