Yea I could understand that to a point. Have you been having these issues because I could see if there was a heavy bump start you could loosen it some but when the motor goes to power it reapplys the force to it to basically retighten what it just loosened. I really dont think that by applying force to the crank that you should ever be able to unthread the rear sprocket. If so it probably wasnt tight in the first place wouldnt you think.
Im am glad that you are trying to keep us up on whats your going through so that when it comes out we'll all be prepared for what to do and what to watch out for. Ever since I got into motored bikes I have wanted to do this. Jackshafting was always the way but I never knew there were free wheel cranks to you all started talking about it. So now IM like that kid wanting that BB gun...but MOMs not here to tell me Im going to put an eye out. lol
Terry