You look to have some lightweight wheels, so that's one huge improvement already, the forks and shock would be another but that's going to be around £2000+ for R+R kit not WSB, have you got rearsets on that thing? might not make a major improvement, but some seem to think so.
I'd ditch the lights, and get a standard race nosecone, 1 to save weight, 2 if it is a prototype you're never going to find a spare nosecone/light assembly easily in case of an off.
Engine wise, well without knowing what it has you could try contacting someone like JHP and have them set it up, Power commander custom mapping, let alone what John could do for you.