Update:
After a good washing and changing the engine and gear oil along with an airfilter service, removed the green ring from variator. Nothing in the airbox but the filter, but that has to be the most restricted stock airbox I've seen.
After I get it tuned in good running stock condition gonna definitely open the air box up and rejet the carb. No uni filter, I generally make sure the air intake system has about the same diameter as the carb intake. While a uni filter is good for high end power, I've found that a more mild intake with the correct size carb (not too big) makes a very pleasant all around powerband.
Got it up to 40mph on level ground and the same on a steep downhill, still feels like it still has some restriction (carb needs tuning for sure). That could be the airbox, the main jet or still a rev limiter in the cdi. Got a tiny tach to put on it and this will let me know about any cdi limiter. The roller weights (6 grams stock) feel too heavy during acceleration so the tach will help tune the variator also.
I'll admit I am biased towards small scooters and bikes, but I love this thing! It is super agile and has very good brakes.
It makes me wanna ride like I'm racing in a superbike championship lol! I can really push this little scooter to its limits and not worry about getting a speeding ticket. I haven't had this much fun since I sold my beloved Yamaha C3, and it's not even running optimal yet. I just sold my Lance PCH 150 and of course it was much faster, but not nearly as much fun.
I'll get some pics up in the next couple of days.