Determining whether motorcycle brake rotors can be resurfaced or need to be replaced depends on their condition. Here are some general guidelines to help you assess whether resurfacing is possible:
Thickness: Check the minimum recommended thickness specified by the manufacturer for your specific brake rotors. This information is typically available in the motorcycle's owner's manual or service documentation. If the rotors' thickness is at or below the minimum specified thickness, they may need to be replaced rather than resurfaced.
Visible Wear: Inspect the surface of the rotors for visible signs of wear. Light scoring or minor surface imperfections can often be resurfaced, but deep grooves, cracks, or severe damage usually indicate the need for replacement.
Warping: Brake rotors can develop a slight warping or unevenness over time, causing pulsation or vibration when braking. If the warping is minimal, resurfacing may be an option. However, severe warping or distortion may require rotor replacement.
Heat Damage: Excessive heat can cause brake rotors to become discolored or develop bluish or brownish spots. Minor discoloration or heat spots can often be resurfaced. However, severe heat damage, such as cracking or severe discoloration, may necessitate replacement.
Thickness Variation: Measure the thickness of the brake rotor at several points around its circumference. If there is significant variation in thickness, it indicates uneven wear and may require replacement rather than resurfacing.
It's important to note that the final decision on whether to resurface or replace the brake rotors should be made by a qualified motorcycle mechanic or brake specialist. They will have the expertise to assess the condition of the rotors accurately and determine the most appropriate course of action based on safety considerations and the manufacturer's guidelines.