I would say your stator just came loose then went in to the flywheel. I bought my banshee and it never ran like a banshee. Went to kick start it one day and it was locked up. Pulled the entire engine out to see what the probem was. Turns out the stator was stuck to the flywheel magnets and that made it seem like it was locked up. The reason why it never ran like a banshee was becuse it turned my adjustable stator plate to -10 deg timing.