@Wolf, let me chime in here too...
Let's start with basics.
I assume side stand up, kill switch on, brake lights working, etc...
Seat and underseat compartement out.
-jump start cables from car (motor not running) or single proven good battery on your scoots battery terminals
-check out your fuses, TAKE THEM OUT and in
-does it start now,
YES/NO
YES, your scoot batt is done
NO, check your fat minus cables from your batt to its frame connection points for loose or corroded parts
RESULT?
If everything is fine with your minus cables
-change your sparkplug against a new one
-put it into sparkplug cap, full in, lay the plug against cylinder head
-ignition on, brake pulled, start switch pressed and you should see a spark on your plug
YES/NO
RESULT?
NO, we have to check your ignition coil/ cables, start relais, starter motor and so on.....
Let's see how it does.