Using this AS3 front brake disc and caliper guard is easy. First, remove the left wheel spacer from your Husqvarna bike. Then, install the aluminium mounting bracket in its place. After that, attach the plastic guard around the front brake disc and the lower part of the caliper. When riding, the guard will protect these important parts from dirt, debris, and impacts. As for maintenance, regularly check the guard for any signs of damage. If you notice any cracks or excessive wear, it's a good idea to replace the plastic guard. Also, keep the mounting bracket clean and free of rust. This will ensure the guard stays in place and functions well for a long time.