Last week I made a engine stand to assist me when building my 650 motor. Instead of using two bolts at the back of the engine, I just used the upper engine hole. This would allow me to remove the bottom case half while on the stand and work on the crank, rods and tranny. Once the bottom end is together the bottom case half can be put in place, I can roll it over and assemble the cylinders, head .....
Cheers, Tom