How do you set points on a Mazda B which has points?

To set the points on a Mazda B with a points ignition system, first, remove the distributor cap and rotor to access the points. Rotate the engine to align the timing mark to the correct position (usually at TDC for the number one cylinder). Use a feeler gauge to check the gap between the points; it should typically be around 0.016 inches (0.4 mm). Adjust the gap by loosening the points mounting screws and carefully bending the points until the desired gap is achieved, then retighten the screws and reassemble the distributor.