Mountain Bike Chain Loose. Chains often loosen when a bike does not have a derailleur. All new chains (not already on bicycles) come longer than they need to be.
All new chains (not already on bicycles) come longer than they need to be. For some versions of XTR, however, all three rings use the same bolt. The chain will be on the largest ring in the rear and the smallest ring in the front.
I noticed that if I changed the twist of the blade section (by turning the spoke slightly with an adjustable wrench set to just slip over the spoke), I could eliminate the noise.
The cause may differ from bike to bike because the mechanics vary.
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The dérailleur is not creating chain tension. It was then I noticed the rear derailleur wasn't taking up the slack, especially in the smaller cogs on the rear. The reason may contrast from bicycle to bicycle on the grounds that the mechanics of each bike fluctuates from the other.