JE Pistons Yamaha YZ450F 12.5 to 1 Piston Single

This is a single forged piston from JE Pistons, designed for the Yamaha YZ450F. It features a 12.5 to 1 compression ratio, which is a notable increase over stock, giving your engine more power. JE Pistons are well-known in racing circles for their strong, well-built components that can handle the demands of high-performance engines.

Forged pistons like this one are made from a solid block of aluminum that's heated and hammered into shape, making them significantly stronger and more durable than cast pistons. This strength is crucial for maintaining compression and resisting detonation under high loads. The 12.5:1 compression ratio means the fuel and air mixture gets squeezed more before ignition, resulting in a more powerful combustion event and improved throttle response. This piston is a direct replacement for your stock piston, but it's important to note that it is not CARB approved and cannot be shipped to California.