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Hello to everyone, new to the forum, I am from Massachusetts and have been bitten by the Scoot bug as of last year.

I did my first bbk (100cc aka 83cc) build on my TaoTao 49cc 1P39QMB engine last week, 69mm valves. 
I installed a performance ignition system, and a performance variator as well as a #83 Jet for the carb.

My issue is this, Before I installed the variator and Jet upgrade, the scoot would lift the front wheel off the ground at take off,  but she was running really high rpm's at the top end and I could only run at 3/4 throttle for fear of over revving the engine.

Since the variator (6.5gr rollers) and the rejetting, I have a steady power band and seems like I am not reaching top end, the rpm's are mid range ( I have no tach) she seems like she wants to keep going, topping off around 40 - 45.
The "snap" off the line is also gone,   she was very "torqy" before the variator and jet.  Is the jetting the issue or the Variator?
I'm still new to this and at 55 years old, I need a bit of help to figure some of this out from time to time. I am a quick study, very mechanically inclined picking the brains of the scooter gods....