hello i have a pride revo with probably only 20 hours use on it it has been a lemon since day one i have MS and cant walk and this scooter keeps letting me down ok its new thing is it starts to make a clicking sound as if i am on and off the gas and it starts to go real slow and will even stop and not move at all if i shut the key off and back on it will fix things {for a bit} i just bought a new set of batteries made no difference any ideas please help dnf61@aol.com