kleduc

New to the forum, so thanks in advance. Got my 6yr old son a ttr50 over the winter. He loves it as its his first bike! The problem is that the throttle sometimes does not fully return to idle speed. At first I thought the choke did not fully close, but pushed that off. The twist grip does return to closed but the engine still revs higher than it should. This happens intermittently. When he's moving it seems ok, but when he comes to a stop in neutral it sometimes sticks. Any info would be helpful. I have a very basic knowledge of small engines. Thanks!