Is your RC51 is good shape? Did you install frame sliders on it or are you taking your chances?[/QUOTE]
Well, my recently acquired 2000 RC51 is a salvaged bike, a bit rough around the edges (AKA character) with some scrapes, bit of damage to plastics here & there, dents on the Hindle high mount race pipes etc. I think it's great, for what I could afford ! Non "mint"ness does not bother me at all, perhaps because I have a "mint" '06 Viffer sitting right beside it.
I can see where you may be hesitant to track it if it is in really good shape but I did not let that bother me when I tracked my then, three month old VFR at Calabogie track two years ago. Same with years back, doing auto track days with my 5.0 Mustang at Mosport, Tremblant, Watkins Glen & a few other tracks. Hell I even shared it with my buddy running in different run groups on the same days on abovementiond tracks.
My opinion: It's a machine that can be repaired or replaced. Memories of awesome experiences last forever.
With a bigger budget, a clean '05 would see track time just as quickly as far as I am concerned.
I must acknowledge the guys on this forum that hold this bike to a higher level due to it's limited number / rarity and I respect that.
Bottom line, do only what you are comfortable with. Don't let ANYONE convince you otherwise...because you simply won't get the full enjoyment out of it.
And yes, as soon as my friend digs out the frame sliders he bought for this bike a while back before he sold it to me, I'll install them ( hint, hint if you are reading this, good ol pal o'mine ....

)
I think frame sliders installed in a set of fairings outweighs possible rash AND an expensive to replace crunched-up rad.
I'll be nervous as hell the first couple of laps, but I can't wait until my first track day !