WOW! MisterB you're in for the blast of your life!
I love my 2003 ZX-6RR!
As far as comparing it to the 636?? :roll:
IMHO it's a mute point, both bikes are sooo similar that you will only notice the differences on the track, when pushing both bikes to the limit. The RR allows for more suspension tweaks, but has 36 CC less displacement. The RR has a slipper clutch, but to this day and after 3000 miles on my bike I haven't felt it working, I'm not very agressive on the street. Another difference, is that you can get the 6R in some awesome colors! I love the blue ones!! Oh and I almost forgot if you want to mount a side mounted steering damper, the RR is the only one of the two that has a boss welded to the frame for that. I have a Scotts top mount, so again that welded boss didn't help me!
I may be wrong, but IMHO no big differences. Unless of course you want to brag that you have a "race ready" limited edition bike (ZX-6RR). Like we do!
I was looking for a nice used 2003 ZX6-R/RR and I found a great deal on a ZX-6RR and that's why I have it. No regrets!! I think both bikes are freakin awesome!!
Anyway let me know what you think!