Links
All ZXR/ZX7R Links
ZX7 Owners Club The best ZX7R/ZXR site bar none. A mine of information. I thoroughly recommend going through every single past thread of the "Technical" and "Performance" topics (take time there is a lot of info). I garantee you will learn something of immediate use to you.
ZXR750 page Info about bringing a J model near to a K model spec
Jurgen's ZX7R Site Lovely site with very good quality pics including endurance racing.
SportsBikeWorld Great Site. Look under "RoadTests" for a good article on Ray Stringer's 793cc ZX7R conversion and under "Bike Features" and "Longtermers" for ZX7R tips.
ZX8R A must see!!! What Kevin has done to his ZX7R (Ray Stringer's 793cc ZX7R conversion as above and much more) is what most of us dream of. Plenty of info on the mods.
ZXR750.de Kai's site. German site with lots of nice ZXR750 pictures.
Kawasaki ZX7 pages Good site with lots of info an pictures on ZXRs and ZX7Rs.
Rene's ZXR750 Page Rene's site in Holland dedicated to his ZXR750J

ZXR750R/ZX7RR Sites
Blake's '91 ZX7R site That is a ZXR-R for us in the UK. Very nice site, lots of info
Kiki's ZX7RR site As far as I know this is the only ZX7RR site around and a nice one too.
'91 ZXR-R Superbike Project Nice work
DandDRacing Gary Racing his '91 ZXR750R. Great site and Great pictures!
John Ivy's site John's site is dedicated to his ex-AMA ZX7R Superbike (ZXR750RM for us non US guys). A truly fantastic bike.

ZX7/9 Conversion Sites
Kwakerjacks Lots of info on putting a 9R engine in a '93 ZXR.
Klaus's ZXR900R German site. Unfortunately I don't speak German, but Klaus has begun to translate parts of his site into English. Take a look because the work this guy has done is excellent! A new approach to putting a ZX9R engine into a '91 ZXR750R chassis.
ZX7-9R Conversion Kit As used by Skydork (see on this site under Tuned ZXRs) for his ZX7/9R.

Engine and Carbs
Factory Check out their "FCR carb tuning guide" and "CV carb tuning guide"
Factory The Factory main page. Lots of tuning goodies there
SUDCO motorcycle parts Good carburettor diagrams

Suspension Setup Sites
Ohlins Suspension Setup A Good site explaining things in a simple but effective way.
Ohlins

Tyres
PB Tyre Guide Performance Bikes Ultimate Tyre test. Super Sticky tyres reviewed.

Track Days
UK Track Day Guide The most comprehensive listing of Track Events for the UK. (and some abroad)

Useful Links
Kawasaki Microfiche site Very useful site if you are looking for part numbers
UKBIKE.COM Lots of bike reviews posted by owners. There are UK Garages reviews too (with ratings). Useful indeed

Miscellaneous Links
TVAM Stay Alive! Get some top notch advanced training virtually for free! I know I am glad I did.
The Edge More Training
UK Speed Traps I believe in using my head when it comes to speed, but this guide can still be very handy.