Motorbike or scooter · Problems

Motorbike chain noise

A chain that slaps, rubs or snatches is slack, dry or worn. A chain that derails at speed can lock the rear wheel.

UrgencyModerate
Can I drive?Yes, carefully
Likely causesWorn or slack chain

Likely causes

  1. Worn or slack chain85%

    If you can pull the chain away from the rear sprocket and see the teeth, the kit is due.

    Garage price: Motorbike chain and sprocket kit £145 – £315Fix it: Replace your motorbike chain and sprockets
  2. Sticky or misadjusted cable5%
    Garage price: Clutch or throttle cable £35 – £120
  3. Wheel bearing10%

    A hum that rises with speed and changes when cornering, like a distant aircraft.

    Garage price: Motorbike wheel bearings £55 – £150

What you can check yourself

  1. Measure slack halfway along the lower run: typically 25 to 35 mm, exact value on the swingarm sticker.
  2. Hooked or pointed sprocket teeth mean the whole kit must be replaced.

Frequently asked questions

Motorbike chain noise: what causes it?

Likely causes: worn or slack chain (85%), sticky or misadjusted cable (5%), wheel bearing (10%).

Can I drive?

Yes, carefully. Urgency: moderate.

Indicative estimate. MecaScan cannot see your vehicle: always have a diagnosis confirmed by a professional, and never work on brakes, steering or airbags without the skills.