Hi there I have a problem with my kick start it works fine as in starting the bike but it doesnt return to the top .  I have taken the side case off and the clutch also the kickstart gear .   The shaft has a half moon shape around it which a key fits in and travels around the same as the kickstart .  It feels like there is a spring in there but it doesnt rest at the top could you help this yam is a drum brake white frame model cheers .