Yeah remove the sprocket cover and clean behind it as well as the whole chain really good with WD-40, soak everything in it and let it set for at least 5 mins then scrub and rinse with WD-40 then wipe and if you have air lightly blow clean. Wait another 10 or so minutes to let the excess evaporate then lube your chain.
Chains can cause all kinds of different noises thought the whole bike.
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