Picked up a CRF 50 for my 4 yo son. He is able to ride his bicycle very well without training wheels. After one day of getting used to the throttle (turned to almost the minimum) and brakes, he can ride the CRF without training wheels. Problem is that when he comes to a stop, he cannot hold the bike up because he is too short to touch the ground and the bike is too heavy for him. Therefore I have to run behind him and catch him when he stops. I'd hate to have to have him revert to training wheels. Just wondering if anyone can suggest another solution.