For CRF 250 R 2004-2007 For CRF 250 X 2004-2017 12100-KRN-672 12100KRN672 Sturdy Construction: Made from refined materials, the cylinder piston kit ensures endurance and long-term reliability, serving as a better replacement for the cut-off concrete saw. Enhanced Performance: Enhanced cylinder and piston components deliver higher power output and cutting efficiency, making your cutting tasks more efficient and smooth. Materials:Crafted from durable materials, this kit withstands the rigors of off-road use. The straightforward setup process allows you to upgrade your engine with minimal hassle ensuring you spend less time in the garage and more time on the road., Manufacturer: Mtuqvma