I bought one of these cheapo folding mirrors and put it on the left grip. Generally I have it folded down underneath the bar... It lets me see what is behind me rather than just my shoulder.
Pretty sure the 1987 model has a headlight that is wired directly to the stator in the motor? might be wrong on this but if correct, it is only getting power when the bike is running, and will get less power at low rpm than high rpm. Does the headlight come on when you turn the key on (with a good battery)?
Best of luck!