JE Pistons Yamaha R1 13.8 to 1 Piston Single

Forged from 2618-T61 aluminum, this single piston from JE Pistons is built for high-performance Yamaha R1 engines. It features a 13.8 to 1 compression ratio, which is a notable increase over stock, designed to extract more power from your engine when paired with appropriate tuning and fuel. The 2618-T61 aluminum alloy offers a good balance of strength and thermal expansion, making it a solid choice for demanding applications.

This piston is a single unit, meaning you'll need to purchase the correct quantity for your specific engine build. JE Pistons is a well-known name in performance engine components, and this piston reflects their focus on creating durable parts for racing and high-output street use. The precise machining ensures it fits right with your existing or upgraded connecting rod and cylinder bore.

Keep in mind that this piston is not CARB approved and cannot be shipped to California. Ensure your engine management system is properly tuned to take advantage of the increased compression ratio for optimal performance and reliability.