Well us skinny meme's do have that areodynamic ability, I'm 6'3 170. My ZX is not just a derestricted boss drive, the whole variator/weights were replaced with a high performance one with a different angled face plate and variator face. I never just derestricted the boss drive with stock variator to see the difference. I got the variator from VT Cycles in Hawaii for around $60.00. I believe it was a Kelli racing variator, not sure what gm the weights are. On a flat nice stretch it will go over 50mph....a nice paved road with no wind that is. On average it's around 50mph I once got it to almost 60mph going downhill.....and it wasnt scary at all, it was actually quite comfortable.