Pro Circuit has introduced a High-Compression Piston Kit for the 2018 YZ250F. Manufactured by JE Pistons to the company’s exact specifications, Pro Circuit pistons are forged from high-quality aerospace aluminum alloy using advanced CNC-machined technologies. The result is a significant gain in low-end torque and high-RPM performance. Pro Circuit High-Compression Pistons are designed for increased performance in either stock or modified engines and is a must-have engine component for serious racers. The piston, coated wrist pin, rings and locks for the YZ250F retail for $379.95.