I just got this quad. First thing is the parking brake switch is bad so i unhooked it, it would only idle untill i unplugged the wires. So now it will rev and drive OK but won't rev all the way up, it kinda bogs and sputters and has almost no power at 3/4 throttle. Sometimes it'll do full throttle and actually go but it smokes white smoke and backfires real loud a couple times, then return back to the regular bog. The carburetor has been cleaned and is not clogged or anything. Any help or suggestions would be appreciated.