The bike will be fast enough as is. The 7R has always been a very fast machine. First hing I would suggest is work on your skills, with a track day, riding school or even just the MSF Experienced Riders course. That will give you more and better speed increases than all the jet kits out there.
Take care and enjoy your great bike!
Richard M. Poniarski
'00 Kawasaki ZR750F2, a.k.a. ZR-7