The effects of OLD gasoline in a classic car

Try dribbling a water hose in the carb at a fast idle. Watch the black stuff come spitting out the tail pipes. Careful you dont go crazy with the volume, just enough to drop the RPM' by a few hundred.
I had a power brake booster lose a seal and it almost sucked the MC dry, smoked like that Ferrari on Sea Foam, same thing happens when a Ford trans modulator goes south.... Lost a piston pin C-clip (or forgot to put it in) on a 2cyl Honda 600 and it wore a groove in the AL cylinder. Burned oil like a sky writing plane.