I would have thought all clutch gears #2513-41 would have been manufactured the exact same dimensions. Same with the case. Same with the roller bearing and the thrust bearing. Hhmm!!! If that is in fact the case then, I would be looking at cutting out the tapered centre of the motor sprocket, and rewelding it up with the correct offset to match the clutch, if this can be done successfully. Just a thought.
The alignment, or positioning adjustment available with the motor, and trans, surely would be very very limited. Especially the motor. If the frame slots are not worn, and the correct locating dowels used, there should be no trans play available.
My motor pulley has like a disc on the inboard and outboard sides, so the belt doesn't run off. The clutch basket has a similar thing on the outboard side only.
My belt runs against the outboard side of the motor pulley. The nice squared edge of the new belt has now worn the corners off slightly, but the belt width still verniers up at 25mm exactly. Like I said, miles will tell. I'm expecting 40,000 miles from my setup. Hopefully!!
ps Is this topic regards fitment of the tin primary cover??