It's a good chance you haven't heard of it, but I have a 1967 Williams "Scoreboard". It's much the same as Base Hit..
I can't remember if the motor has oil ports, but probably not. Although you can try putting a couple drops of
light weight oil on the tail of the motor's armature. That could give it a little more life. Also you can wax the ball launch
ramp, and even the balls themself, and also under the flap..
Doing all these steps could make a noticeable difference..