Cameron

Hey everyone. I'm 16 and a relatively new rider. I've had my moped for a couple of months now and I've noticed a recurring problem. The bike will frequently cut out, the lights stay on but it won't rev. This problem is guaranteed to happen when going up steep hills and occasionally occurs on flat roads. From my own testing I've noticed that it must be something to do with the belt or that area because it sounds as if the belt slips off. Any advice or solutions would be greatly appreciated (My bike is a peugeot kisbee, has had previous owners and is quite rusty)