Using your AS3 radiator brace guard is easy. First, take out all the parts from the package and check if you have the fitting instructions and all the bolts. Then, follow the instructions step - by - step to attach the guard to your 2021 Honda CRF 300 L. When riding, just enjoy the peace of mind that your radiators are well - protected. As for maintenance, regularly check the bolts to make sure they are tight. You can clean the guard with a mild soap and water solution to keep its matt black finish looking great. If you notice any signs of damage, contact the UK company for help as it comes with a 12 - month warranty.