Those rpms are insane. Redline is 8k on these engines. You are strictly using rpms to push the bike. You need more CVT tuning.
Im 250 and my 50cc is quite fast. I run a performance variator with 5gr sliders. Get a performance variator and get those revs down under 8k.
I always say that your first scooter is usually the guinee pig. It will be short lived and you will take those lessons and use them on your next scoot.
__________________
|