Brake lights staying on

The switch has been a factory set for 48 years, if I pull the pedal back they go off. Always worked fine prior to M/C & booster replacement.
Same thing I had. If I remember there wasn't enough switch adjustment. When you replace the master with a new or rebuilt unit exactly the same as the one you took out and the pedal won't return it is frustrating. I should have rebuilt my original master. :BangHead::BangHead: