I got a new spark plug for it when trouble shooting and haven't had any trouble getting a spark. The spark cable and the plug boot look almost new, in fact they look like they're the newest part on this bike. When I got it, the spark plug in there was a champion with a spark gap at less than .01", I put in the right NGK plug at just under .03" gap and its running fine now.
I got it running by putting fresh gas in after draining the tank.
I'm going to paint it this weekend and then I'm going to try out Evaporust . I already got a gallon of Evaporust but I figure it'll be easier to paint with an empty tank.
I'll be weary of the issues with the spark boot.
Did you upgrade any parts on your Targa? I've been considering a new exhaust cause the one I have is a crummy looking custom exhaust, with shitty welding, a lawn mower muffler, and rust.