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Motorcycle Brake Pads Making Metallic Friction Noise?

4 Answers
VonJohn
07/29/25 8:48pm

Motorcycle brake pads making a metallic friction noise could be due to the friction sound from the brake disc or the brake pads being worn too thin. It is recommended to go to an auto repair shop for replacement. This sound is usually very slight when braking but becomes louder and more piercing when the brakes are applied. Composition: The braking system consists of a vacuum booster pump, master cylinder, wheel cylinder, brake pads, and brake disc. Brake maintenance methods: High-temperature protection to prevent corrosion of the braking system, avoid brake pads from seizing due to high temperatures, and eliminate brake pad squealing; clean oil stains, dirt, and friction dust from the brake disc, brake drum, and any other components to maintain good heat dissipation of the brake disc; regularly replace brake fluid; and periodically check the thickness of brake pads or brake shoes.

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McEmiliano
08/14/25 6:19pm

Last time I rode my bike, I also encountered this screeching sound, like metal scraping against metal, which made me stop in a hurry to check. I found the brake discs covered in sand and mud, grinding hard against the brake pads. I used a toothbrush dipped in gasoline to carefully clean the grooves of the brake pads, then blew away the dust with a high-pressure air gun. Since then, I've made it a habit to check the thickness of the brake pads every 500 kilometers, using a vernier caliper to measure, and replace them immediately if they're below 3 mm. Actually, it's best to use anti-rust spray to maintain the brake discs after riding in the rain, otherwise, they can rust and start squeaking. If the brake caliper pistons don't retract smoothly, it can also cause strange noises, so it's necessary to regularly clean the dirt around the piston edges.

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DanielaRose
10/16/25 6:40am

Metallic squealing usually indicates brake system issues. In most cases, it's the wear indicator scraping against the rotor when brake pads are worn out. I remember my touring bike's last squeal was precisely this - the thickness gauge showed only 1.5mm remaining. It could also be misaligned pads or unsecured retaining clips. I've even encountered severely warped rotors where disc runout exceeding 0.2mm caused constant grinding. If DIY isn't your forte, have a shop check rotor flatness with a dial indicator. Machining might be necessary since this concerns life-saving equipment.

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StMaddox
11/29/25 7:26am

My buddy's newly purchased sports bike started making metal grinding noises just three months after riding it, scaring him from squeezing the brakes. Upon disassembly, we were stunned—the vibration damping washers were forgotten during the factory assembly, causing the brake pads to rattle loosely inside the caliper. An experienced veteran mechanic taught us a neat trick: after a cold start, gently apply the brakes at low speed a dozen times to let the pads and rotor naturally align and break in. If the noise persists, there's an 80% chance it's due to poor-quality brake pads—those with over 30% metal content are notoriously prone to squealing. Switching to organic-material pads makes a big difference; they're quieter though less durable.

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