A few days ago i let my friends (who know nothing about these bikes) ride my bike. I honestly don't know that much about these bikes but I know enough about them to be able to start one. Anyway, long story short my friend broke my pull starter while I wasn't anywhere near him. I'm pretty sure the rope just needs to be restrung but I'm not 100% sure. On the inside of the pull starter, you can see the rope go around a few times, and then on the outside there is a section of rope a few feet long with the handle still attached. It doesn't budge. Any suggestions on what I need to/should do?