I'm new to working on bikes but have a good knowledge with cars so I'm sure I can handle this. I went down on the left side and cracked the crankcasing, chipped the rotary assembly. I bought a new oem stator coil, crankcasing, and rotary assembly. I waited on the rotary for a month on back order and I finally received it and I cannot figure out how to get the old rotary off. Any tips would be greatly appreciated.