At this time you will need to modify the Woodruff key mentioned in the list of needed parts. The Banshee Flywheel uses a 3/16″ key, while the XS650 crankshaft uses a smaller key. This took about 5 minutes with a good file.
The Woodruff key is the small part on the crankshaft. When you install it on the crank, it should fit like this. Feel free to loosely slide on the flywheel to test fit as you are working on this step. I like to use a little grease to hold these in place during final assembly.