Bikes have a disconcerting habit of rattling at different times, and it’s hard to tell whether it’s serious, or just a sign of a certain age.
If it sounds like it is coming from the clutch area when the bike is ticking over, it’s caused by the plates and other parts chattering around when there is no load on them.
The noise should go away when you rev the bike or lift the clutch. If it doesn’t you should get it checked out because the camchain tensioner could be sticking.
If the tensioner is sticking it puts a lot of strain on the camchain and means it wears out faster. And don’t leave it too long because it is likely to get worse. The chain isn’t likely to snap, but it will cause major damage.
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