Namuras cylinders and cylinder kits are designed to meet the needs of both casual riders and performance enthusiasts alike.By offering a variety of sizes, including +5mm big bores, Namura ensures that you can find the perfect fit for your engine rebuild or enhancement project. The advantage of choosing Namura goes beyond just their selection of cylinders. When you opt for a complete kit, you not only get a high-quality cylinder but also a carefully selected Namura piston and top-end gasket kit. This approach ensures that all the components work seamlessly together, resulting in improved power and performance for your engine.Cylinders Brand new and designed strictly off of OEM specifications. cast from ab4c aluminumWith nickel silicon carbide plated bore. this allows our cylinders to have some of the best wear capabilities in the market. most cylinders are simple drop in install with no case modifications necessary.