Using your AS3 rear brake disc guard is easy. First, find the mounting points on your Kawasaki bike's rear brake area. Attach the guard using the provided mounting bolts. Make sure it's securely fastened so it can do its job well. When riding, be aware that while the guard protects against stones and debris, it's not indestructible. Avoid hitting large objects at high speeds as this could damage the guard. For maintenance, regularly check the mounting bolts to ensure they're tight. Clean the guard with a mild soap and water solution to remove dirt and grime. Don't use abrasive cleaners as they can scratch the anodised finish. If you notice any signs of damage, like cracks or loose parts, it's best to replace the guard right away.