Using this AS3 front brake disc guard is easy. First, make sure your bike is one of the compatible models mentioned. Remove the front wheel spacer and then install the guard in its place. The guard is designed to fit well and provide protection right away. When it comes to maintenance, a simple wipe - down with a clean cloth after each ride will keep it in good shape. Check the mounting bracket and the vents regularly for any signs of damage or blockage. If you notice the guard is worn out, you can easily get a replacement. Just remember, this guard is only for the specific models and wheel spacers as described, so make sure your bike meets those requirements before installation.