Cam chain noise.. again?

[davidkent]

Also, while this is off, how do I check valve clearances?
Is this further stripping or not too bad from here?

I have some feeler gauges its just knowing what to actually do.
Apologies for 10 replies in a row, just want this bike working, im terrified it'll break while riding and throw me into a bus or something, Being a relatively new rider, I doubt id to handle any failures..