hi all, new here and need help sorry. my son has a 2007 generic 50cc xor, he says it has no revs and no power, is there anything i can check to rectify the problem as he needs it to get to work.( am a girl btw so may not understand a lot of technical terms lol) the nearest dealer/repairer is miles away from where we live and cannot limp it to the garage. would be grateful for any help. thanks