Hello guys, this is my first post-what a great forum you have here!

I've just purchased a low km (<16K) NSR250R (MC-21). As far as I'm aware its very orignal/totally complete, with the exception of a non-factory paint job.

I want to track ride the bike only with only modest mods. My questions are as follows!:

What mods can I do that are easily reversible and will provide the most benfit?
is the factory oil injection system reliable enough for high performance applications?
Is a steering damper required? (I'll have the triple clamps as close to the top of the fork as possible)
I'm accustomed to swapping out a main jet on a dirt bike in a matter of minutes-can the main jets be quickly swapped out on an NSR at the track?

I'm sure I'll have more questions at a latter date!!

Thank you in advance guys,

Cheers, Frank