How to Adjust a Noisy Motorcycle Chain?

[EmersonFitz]

First, turn off the vehicle. Do not start the engine during the adjustment process. Use a wrench or manually loosen the corresponding screws. Use a flat-head screwdriver to rotate the tensioner shaft clockwise to loosen it, then rotate counterclockwise to lock it.

[MacJaxon]

When I used to ride motorcycles, chain noise was a common issue, usually due to the chain being too loose. You need to find a flat spot to park, turn off the engine, and check the chain sag. Use a ruler to measure it; the ideal range is 20 to 30 mm. If it's too loose, loosen the rear axle nut, then turn the chain adjuster bolts to tighten it. Be careful to ensure the chain remains parallel and the wheel is aligned during adjustment, otherwise it can accelerate wear. Once adjusted, tighten the nut and finally spray some chain lubricant to reduce noise. Regular checks can prevent this issue. If the chain is severely worn or rusted, it's best to replace it with a new one directly to avoid breakdowns mid-ride that could affect safety. The tools needed are just a wrench and lubricant—simple and easy to operate.