I would think you could keep stock compression for a 25 HP shot (not sure though...) I would definitely use a "wet" system to help keep the motor from knocking. It wouldn't take long for a high-strung sportbike motor to self-destruct when the knocks start. N2O is fun in a straight line. I would NEVER use it in corner exits though. Can you say "instant highside?" I knew you could.
Edit: Oh, and I would retard the ignition timing for the same reason described above. I would suggest talking to a drag bike tuner or someone who has experience with N2O on bikes. This is something you need to get right the first time.
"You must be fast 'cuz I was haulin' ass when I passed you"
1999 Blue/White YZF-R1: 2 Bros. C4 exhaust, Dynojet jet kit, timing tricker, dyno-tuned by Graves
2000 NBM/Lt Oak int/Blk top C5 Convertible - MN6, Z51, Vortex Rammer, A&A Exhaust, C/R X-pipe, Corsa tips, !CAGS
[This message has been edited by mashuri (edited July 14, 2000).]