its done this a couple times in the past, when my g/f's bro was riding it, he would stall it out while riding and then try to kick it over again and the kick start was locked, and then again the other day i was kickin it to start it up after riding it for about 15 mintues, kicked about 3 times then locked, i had to do some major finaggleing with the wheels and stuff to get it unlocked last time, but what could be the cause of this? never been inside the case yet, so dont really have any ideas.. any help would be great.