hi my aerox kept loosing power when my carburator was taking to much air so had to get my carbrator tuned also if you have not checked your rollers in the varioter see if they are worn down it could be your airbox checked if sealed to carbrator properley it could also be your throttle cable may have came of slider (loosens throttle cable) this means that the accelrator will not respond as it should if you do not know about basic enginge components seek mechanic
mike
January 2009