Chain noise

Mukesh_24 · Feb 3, 2020

Hi Everyone!
Today i done my duke 200 first free service. Everything is fine. But there is a chain rotating noise which im hearing while riding. Is there any issue. I have done only 500km.

Axzon · Feb 4, 2020

Welcome to the forum!

Did you hear that noise before the service?
You can do these things to make sure all is OK:

Check the alignment of the chain. By that I mean that you need to make sure that the chain can go in a straight line from front to rear sprocket. And the two sprockets must be in a straight line in relation to each other. If not, then adjust the rear wheel so that the two sprockets are in a straight line.
Also check that the rear wheel axle is fitted properly and the axle nut is tight!
Check the tension of your chain. When the swing arm goes up and down there should be no position where the swing arm tensions the chain so that there is no slack in the chain. We use KTM's for Motocross and we put two fingers under the chain on the top side of the chain where it goes over the swing arm at the front next to the tyre when the bike sits on the ground. (I would assume that you don't need 2 fingers of slack. Perhaps one finger is enough? This should be described in your user manual.)
Check that nothing is hindering the chain anywhere. There could be a loose bolt or nut, rocks, dirt etc that rubs on to the chain.
Use quality chain spray to keep your chain lubed. If you have an O-ring chain (that has small rubber O-rings on the links to stop dirt from going in to them) only use chain spray that is made for O-ring chains.
Make sure the chain link is right size (and does not stick out on one side) and has it's lock-clip properly fitted with the opening backwards when the link is at the top of the chain.
If there is a "chain guide" (an area where your chain goes through a "tunnel" at the bottom before it gets to the rear sprocket, check that there is nothing inside that should not be there. Also check that this one is not badly worn.
With so few Km's riding being done your chain should still be like new. But to make sure check for wear/stretch in the links. Here a simple video re this:

Always use quality chains. They will cost you a little more, but the payback is that they last much longer and do not wear down your sprockets as quickly.
There are a few different chain sizes and types. Make sure your chain is the size your user manual recommends!
And with so few Km's of use this should not be the issue, but just in case: Make sure your rear wheel bearings are in good condition and the rear wheel (when no chain is on the wheel) does feel stable and you can not "wiggle" the wheel on the axle. Also that when you spin the wheel, without the chain attached. it spins freely and there is no noise from the wheel bearings.
Check that the rear sprocket is securely fitted to the rer wheel. (The bolts need to be tight!)
Also check that the front sprocket is properly fastened to the axle on the motor.
I assume your front sprocket is inside a cover? If so, remove that cover and check that there is no rubbish in there and that the chain does not rub on something in there.

Come back and let us know how you are doing.

Chain noise

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