I'd have a butchers at the camchain tensioner. For the oil leak, you'll have to completely clean it, then run it somewhere clean so you can track it down.
I’m sure that’s simple but I’ve not a clue what I’m doing so garage might be the way forward. Would a worn timing chain be a cause? Valve clearance?
These are things I’m seeing with a quick google.
Bike is 21k miles old. 2007
I'd have a butchers at the camchain tensioner. For the oil leak, you'll have to completely clean it, then run it somewhere clean so you can track it down.