Using this AS3 Performance front brake disc and caliper guard is easy. First, remove the left wheel spacer of your 2013 - 2023 Beta 125 RR 4T LC Enduro. Then, install the aluminium mounting bracket in its place. Next, attach the plastic guard around the front brake disc and the lower part of the front brake caliper. When it comes to maintenance, regularly check the plastic guard for any signs of wear or damage. If it's worn out, you can easily replace it as replacement guards are available. Keep the aluminium bracket clean to prevent corrosion. Also, make sure all the connections are tight before each ride. And remember, this guard is compatible with 270mm oversize discs, so choose the right setup for your bike.