Anyone can crack their engine case and get really bummed about it like me. This happened to me a few months ago and I have been trouble shooting this for a while. Bike was kicking into neutral so bad it loosened the rear motor mounts and the shifter linkage. Bought it with some of these issues but didn't really know what was wrong. So first don't sell or panic! Lol! First lock down your motor mounts, make sure your bike isn't jumping out of gear by adjusting the shifter linkage and you should stabilize the crack. Then clean, sand paper, drill spaced holes and Jb weld like crazy! Then change the oil and get out any metal shavings and what not. Held up about 50 miles of the roughest riding with minimal and no visible oil drip and no sign of weakness!! I call that a Success!! Thanks @2Kings and @MikeR thanks for the "I'm really impressed it held up!" Used some silver engine paint to freshen it up. Note to everyone don't use quick steel!!! It sucks as you can see in one pic.