Looks like the '84 Z50 pilot jet is pressed in, meaning it's not removable. But you still might be able to clean it with the appropriate sized jet cleaner.
The main jet can probably be removed with a screwdriver, but be careful not to be too forceful or you may damage the brass. Once the main jet is removed, the needle jet is just above it. Pop that out and make sure it is not clogged either. Hold them up to the light. You should be able to see through the holes.
Points and condenser are underneath the left engine cover, located behind the flywheel. They are visible through the holes in the flywheel.
Here's a couple of diagrams you may find useful:
OEM motorcycle and ATV parts from Honda, Yamaha & Polaris – Cycle Parts Warehouse Alternator Carb