...Yeah, but Kev, re-wiring a Trumpet is about as difficult as wiring a plug on a kettle! LOL
Go for it Jimmy, its never as hard as you thought once you get started. Take your time & gather everything you need, decent wiring, top quality connections and a quality crimping tool.
I completely rewired my Triumph T120R & changed many of the wire colors to suit my eyes ( color blind red/brown ) took my time & surprised myself with how well the job turned out
Ask around for someone to look over your shoulder. If he doesn't want to bring his own VOM and soldering tools keep looking. If you find that person, have any and all electrical tape cut off any wire on the bike before he shows.