How to Tighten a Loose Motorcycle Chain?

1 Answers
FranciscoLynn
07/30/25 6:37am
Lift the rear wheel off the ground, loosen the axle nut in the center of the rear wheel, and release the lock nuts on both sides of the chain adjusters. Turn the adjusters backward a few turns, then tighten the lock nuts while observing the chain tension. Adjust both sides evenly until the tension feels appropriate. Additionally, avoid over-tightening the chain, as it can damage the countershaft bearing and needle rollers, and significantly reduce the lifespan of the rear wheel cushion bearing. The ideal chain slack should be maintained between 15mm to 20mm. Below are specific details about motorcycle chains: 1. Function of the Chain: The motorcycle chain connects the transmission output gear to the rear wheel drive gear. If it's too loose, it cannot ensure proper gear ratio and power transmission; if too tight, it may wear out or break. It's best to promptly inspect and replace a loose chain at a repair shop. 2. Effects of Poor Maintenance: If the chain is not regularly maintained, poor lubrication can cause increased friction during operation, leading to power loss in the engine. Long-term improper operation may also result in chain loosening or even detachment. Therefore, regular cleaning and lubrication maintenance are necessary for the chain.
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