Using this chain guard is easy. First, make sure your Yamaha KT100 engine has standard rotation as this guard is not for reversed rotation engines. If you bought the chain guard with mounting hardware, use it to securely attach the guard to the engine. If you purchased it without, find the appropriate hardware to fit. When installing, pay attention to the TCI ignition box mounting area. The TCI hold - down, which you'll need to buy separately, should be installed correctly here. For maintenance, regularly check the chain guard for any signs of wear or damage. Since it's made of aluminum, it's resistant to corrosion, but it's still a good idea to keep it clean. If you notice any loose parts, tighten them up right away. And always follow the manufacturer's guidelines for the engine and this chain guard to ensure optimal performance.