Athena 10-18 Yamaha YFZ 450 Bill Balance Edition 97.94mm Big Bore Cyl 4T Forged Racing Piston

If you're looking to rebuild or upgrade the engine in your 2010-2018 Yamaha YFZ 450 Bill Balance Edition, a high-performance forged piston is a key component. This Athena piston is designed to replace your stock unit with a larger 97.94mm bore, often referred to as a big bore kit, which can significantly increase engine displacement and power output.

Athena uses special nickel, silica, and aluminum alloys in their forged pistons. This construction method, combined with advanced CNC machining that holds tolerances to less than 0.01 mm, results in a piston that offers greater resistance and excellent performance compared to stock. The smooth profile is also designed to promote regular fuel flow and proper flame propagation within the cylinder, contributing to overall engine efficiency and power delivery.

This piston is a solid option for those seeking to enhance their YFZ 450's capabilities. Please note that this part is not CARB approved and cannot be shipped to California.