Hey everyone, first I would like to say thank you to anyone that helps me out. I just recently bought my son his first pocket bike. My delima is that he's only 4 (almost 5) and it goes 35mph and it doesn't have a kill switch. It's a gas powered bike. I'll include pics. I think 35mph is a little too fast for my youngster. Is there anyway to put a governor on it until he's ready for speed?