How do you rebuild 1988 Yamaha YZ 80 rear shock?

To rebuild a 1988 Yamaha YZ 80 rear shock, first, remove the shock from the bike by detaching it from the swingarm and frame. Use a shock rebuild kit tailored for the YZ 80, which includes new seals and oil. Carefully disassemble the shock, clean all components, replace the seals, and refill with the appropriate type and amount of shock oil. Finally, reassemble the shock, ensuring everything is torqued to specification, and reinstall it on the bike.