Overall nitrous info: a "dry" nitrous system is nitrous only, a "wet" system mixes fuel w/ the N2O in the throttle body. A dry system is typically used for lower HP ratings. My buddy has one on his Suzuki SV 650 S bike. He runs the 40HP jet and no problems. A wet system, in my opinion, is more stable in that it has a "mixer" (the fuel) and is not quite a harsh of a shock to your internals. The fuel acts as a cushion of sorts.
A stock fuel pump on an EFI motor should be able to sustain a 100HP shot. If you R concerned about leaning out, run an inline booster pump with a regulator. Good idea anyway for future upgrades