Wouldnt a bit oh heat on the ring gear all the way around it help to drve it back tro the shoulder? That is how we used to install themIf it's just the ring gear that wobbles, is it possible it has shifted on the clutch basket?
There is a shoulder that the ring gear should be against and if it isn't, you can use a dead blow hammer to make sure it's against the shoulder. Once the ring gear is against the shoulder, it should be straight and in the right position for the starter gear. Just something you might want to check and would be a cheap fix.
After re reding this I am wondering how you are spinning the hub with the plates removed? Is the hub tightened ? You say the tranny main shaft looks OK, tho when you spin it it appears noisey? Is it possible the inner primary bearing is bad?2004 Heritage. Hearing a knocking noise, seems like it is inside the primary. Took off the derby cover and ran it, could hear the noise is coming from inside the primary. Took off the primary cover, didn't see anything unusual, chain tension is good, tentioner shoe is fine. Took the discs out of the clutch, everythings looks good. When I spin the clutch basket with the discs removed, i notice that the ring gear wobbles. The ring gear is not loose, the whole outer assembly it is attatched to wobbles. The trans mainshaft looks ok, although when I spin it I can hear some noise. I'm trying to find out if this all seems normal or indicates a problem.
For what its worth. My money says compensator nut. I have seen several around this year model that needed retorquing to spec. As always use red loctite. I cant remember the torque setting I think its 160 then another 45 degrees.