Scott -- I'll assume the PM that Jon N. sent you discusses tire costs and such. Just in case -- I remember about $350 for a new 190/55 for the ZX12R - sourced, shaved, balanced, nitrogen-filled, and shipped. No need to shave the front -- just the drive tire. As for your speeds -- that, I'm sorry to say, doesn't mean much -- it's the speed of the record in your class that determines what safety-related items apply to you.
Regards,