Where di the scoot originally come from? The reason I ask is there are many different set up depending on the market it was built for. The rear gear set SHOULD be ok. The 5.5 gr rollers seem to work best on the 4 stroke engines when combined w/ stiffer clutch fly springs. The heavy rollers will give a better top end; true but the lower rpm's will suffer ie:hill power. The super 8 is a super scoot. It does need to be set up correctly, and most of what you have to do depends on the sale market. The most consistent improvement is in the cvt. I would highly recommend 5.5gr rollers, and Malossi clutch springs as a GOOD starting point. Deff. reconnect 1 of the cdi wires also (just to be sure). I understand it is a new scoot but has anyone done a compression test on it? a quick check should show at least 100 lbs. 110 -120 is perfect. also the valve adjustment is critical on that engine. I believe it is .04mm. search some of the posts on this site using keywords, and you will find more specs. I do know the cvt set up I recommend is good, and I trust your gear set is good. Do the valve check, and the compression test to be sure you are ok there, and take things 1 step at a time. If you change multiple things at once you dont' really know what did what. ROCK ON~