I had this issue today, trying to torque the 32-ish foot pounds needed on the clutch basket nut.
Engine is on a stand, no chain around to use as a whip around the sprocket. Certainly cant hold onto the basket with bare hands lol, and shoving something in there to wedge seemed like a bad idea.
I pulled the sprocket hex head nuts out, left the sprocket on, put a pin spanner in the thread holes of the sprocket, put in gear, let the pin spanner come in contact with the engine mount/stand, hit the required torque no problem. Got that whole side put together.
I planned on replace the sprocket anyways, not sure if it fouled the threads or not.
