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When you try repeatedly to start it, then check the spark plug, is the spark plug wet?

Yes the plug gets wet, the fuel delivery neither the air delivery to the cylinder seems to be the issue since it won't even start on starting gas spray.

Hello,
I have a Kymco Super 9 A/C from 2007 that has been mine for the last 5 years with 14000km on the odometer. It worked flawless until last week when it suddenly gave up on me, there were no special circumstances when it happened, but some slight powerloss might have been experienced some days before until the breakdown. After that it haven't fired up even once.

Things I've already tried:
Cleaning the carburator
Cleaned airfilter + everything related to the air
Checked/cleaned the reed valve membrane
(Fuel and air should not be the problem in my opinion since it wont even fire up on "starting gas spray")
Checked and replaced the spark plug
Replaced ignition coil
(I have visible sparks on the plug but it looks kinda weak)
Battery is some months old but in good condition.
Removed cylinderhead and inspected the piston, everything seems to be in good condition no scratches or cracks anywere.
(Unsure about the pistonring wear, I haven't tested the compression)

Things I'm considering:
Replace piston rings (I've got compression but is the pressure enough? What should the pressure be if I manage to test it somehow?)
Replace CDI (I'm getting sparks, but could this still be the problem? Super 9 air cooled uses the AC-CDI correct?)
Replace voltage regulator (Can a faulty voltageregulator make it unstartable?)

Or is there anything else that would help me?
Hopefully someone can help me and pardon my grammar, English is not my first language.
Best regards
Lenkan