CP Pistons 13.5:1 Piston Kit for 03-09 Yamaha YZ450F - M1051

SKU: M1051. The CP Pistons high-performance piston kit is engineered for 2003-2009 Yamaha YZ450F engines built for competitive motocross and off-road racing. This kit features a 13.5:1 compression ratio with a 98mm bore (+3mm oversized) and 63.4mm stroke, increasing displacement to 478cc for stronger midrange power, faster throttle response, and improved overall performance. Precision-forged from premium aluminum alloy and CNC-machined to exact tolerances, these pistons deliver excellent strength, thermal stability, and reliable ring seal under extreme RPM and race conditions. Designed to meet the demands of serious riders, this CP Pistons kit offers proven durability and race-winning performance.