I have a Sanyou Group SY50qt scooter. I'm sure no one has ever heard of it. Anyway, when I pull the throttle back it doesnt go for a few seconds. It makes these rev sounds and then goes. I dont know anything about these scooters so I was hopein someone could help me. Also, on the off chance someone has heard of the type of scooter I have, please tell me where to find replacement parts.