In troubleshooting starting issues I found that the points breaker on my 1974 125XL is fused shut. Beyond soaking it in pb blaster (which has been my approach thus far) any recommendations for freeing this up?
Fused breaker points implies WELDED breaker points. The electrical activity which causes pitting has exceeded operational limits and has likely bonded one surface to the other.
Even if you were able to separate the points mechanically, the surfaces would be poorly suited to operate in the normal manner.
Ideally, these parts are not going to break your budget. Using The Google, I found a set for less than eight American dollars, shipped from Thailand (some delay involved!)