after mounting the motor, tank, throttle and everything else, get on and pop the clutch....zoom takes off...right. the idle is high...read this, do that...do this, read that...drill out jets(which i did not do) that size is in there for a good reason...then i figured out...dont fool with the carb.. adjust the cable!!!! thats what those twists things are for on the levers at the end of the cable!!!! everything is now perfect. one thing i did do though, moved the e-clip to the very top notch on the needle. that slowed things down a bit. 41mph was just tooo fast!!!!!!!!!!! grubbee skyhawk gt5a is the bomb of bombs!!!!! darn good 2stroke!!!