Periodically, the CVT (variator, belt and clutch) should be inspected and cleaned. Often, the "belt-dust" (particles of the belt) accumulates in the variator and clutch, and should be removed with compressed air and the belt should be inspected for wear and stretch. I replace my belt regardless of wear every 3000 miles.
Also it is good practice to SAND the shiny-ness off of the CLUTCH BELL SURFACE and the CLUTCH shoes when you inspect/clean the CVT.
But if you want you bike to be snappier off the line, replace the variator weights with lighter weights, or BEST, flat-slide type of LESS than you stock weights. If your bike is stock, the weights will be 14g. Try a set of 12 or 11g FLAT-SLIDER weights. A larger steep-angle variator such as a KOSO 115mm will greatly improve take off as well.
Lastly, AFTER you have done the variator, you could try a different clutch shoe and contra spring set, I like the red ones.
With my set up (list of parts on sig, my bike is my avatar pic) I can pull a mean hole-shot on dry road, and hit 60mph in 9 to 10 seconds.
I see you are using 10g weights, try going up to 11
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2011 Roketa MC-23-150
4T 150cc 157 qmj
24mm carb w 115 main jet and paper cone air filter
Manual petcock w Tygon fuel lines
Scrappy Dog Scooters Retro-slash stainless straight-thru exhaust
RED spring clutch
Adjustable CDI (brand unknown, it's blue and red and works great!)
KOSO high performance variator w 12g sliders
Gates Powerlink 835-20-30 belt
GPS verified 65mph on flats.
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