1986 trx200sx

Hey guys! I just picked up a 1986 trx200sx, I know nothing about it other than the harness is butchered. I would like to rebuild it myself. I’m not a Novice but I can’t seem to find the correct wiring diagram, and don’t know the specifics on this atv. For example, does it need a battery to start if pull started, can I bypass the killswitch and ignition switch, does it have to have a key switch etc. So any help on this would be amazing! Thanks in advance!