One of the most important considerations before riding it on the road is the conditions of the brakes and tires.
For the brakes, pump out the old fluid through a clear plastic tube connected to the bleeder valve into a clear glass jar. Start with a little clean brake fluid in the jar and pump out 200% volume of the reservoir, lines and caliper. You should get some pretty nasty stuff out at first. Once it is clean, pump out at least that volume again (like I said, should be at least a 200% flush). Do this for both front and rear systems.
On the tires, you should probably just replace them. But at least inspect the outside of the tires for signs of dry rot. The problem is that you may not see a problem from the outside of the tires.
Replace the fluids and flush out the tank and lines of the fuel system. Rebuild the carb making sure you chase all the ports with carb spray. Inspect the diaphram of the accelerator pump and the slider carefully to make sure there are no cracks. Chase the jets and the tube with carb spray thoroughly. Make sure all those little holes are clean. Use ethanol or methanol to dry up all the system before putting fresh gas back in.
Replace the plugs and wires.
Let us know how it goes.
Cheers,
TQ