I happened to be consider'n just that when I saw your post come in. CKangeroo (Roo) turned me onto some really cool, big box, cruiser bikes. I wanna do some budget builds for a quick turnover.
But was thinking about rag joints vs the higher end sprocket deals. Cheaper wheels, the spokes just bend with the torque of a 4 smoke.
So just happened to be thinking of instead of a rag joint. Make it a rag joint+.
Same deal but larger backing than the normal rag joint. That a sprocket bolts to.
So the stress is spread over a larger area but is still a universal fit. (Universal; one size fits none perfectly) But this might.
If nothing else, would make switching sprockets easier.....
But great build.
Dave (31) did a "junkyard build" and I confused your thread title with his. Awesome build as well. Think he did it for like .34 cents or some thing crazy like that. All found parts except he had to buy a washer or some thing. Was amazing. He "saddle bag" mounted a 4 stroke engine back when the rest of us were still trying to figure out 2 smokes.