How to Determine if a Motorcycle Chain is Too Tight?
2 Answers
When the chain is forcefully lifted vertically, the relative vertical displacement range should ideally be between 15 to 25 millimeters. If the relative vertical displacement range is less than 15 millimeters, the chain can be considered too tight. Below are relevant explanations: Explanation 1: When the chain is adjusted too tightly, the increased contact pressure with the sprocket can cause the chain to stretch, the chain plates to deform or break, and the chain rollers to shatter. Explanation 2: Over-tightening the chain can also damage the countershaft bearings and needles, significantly reducing the lifespan of the rear wheel cushion bearing.
I've been riding motorcycles for several years and have seen many chain issues. A chain that's too tight can easily cause abnormal noises or even the risk of breaking. The method to check is after parking: find the middle position of the chain, gently push it up and down with your hand. The normal looseness should be about the width of a finger, approximately 2-3 cm. If it's too tight, you won't be able to push it up and down, and it will feel very stiff. You might even see the chain stretched straight. I always do a quick check before each ride to avoid sudden chain breaks while riding. Long-term neglect can also accelerate sprocket wear and increase repair costs. It's best to adjust according to the specifications in the bike's manual, which makes riding smoother and safer.
