Fixing up an 85 125m. Popping out of gear when shifting/false neutral etc. Took the right side cover off. I can see that the "shift drum stopper" is broken at the 90 degree. Looks like this is an easy part to replace. Problem! The two screws that hold the clutch retainer on are frozen up. I can't get them to budge. Need to get under it to remove the lock washer and clutch bolt to get the clutch off then the big gear that the shift drum stopper hides behind. Any suggestions for removing the screws without damaging the clutch or the threads that the screws go into holding the retainer in place? Also good source for a shift drum stopper, side cover gasket, and obviously new screws for the clutch retainer.
Thanks!