S4r clutch wear and detonating noise Eeeek!!!

[Tiny30]

Righteee ho!

Two queries I have rattling around in my heed at the moment, Number 1 is:

Bike just done under 8k, recently had service. Noticed that I occasionally get a squeek out of the clutch mainly when cold and the clutch behaves a little eratically also. Surely this cannot be the plates wearing out already???? Is there a test I can easily perform and what are the best replacements if there are on their way out?

Number 2, Noticed that occasionally (and recently more often) when bliping throttle or wrenching it for whatever reason (under load and otherwise). I sometimes get what I can only describe as a nuted phut or pink (kinda like a muffled pop), which may be coming from the top of the engine...........Anyone any ideas what that could be? and what may be causing it?

Thanks in advance.

Rich.