black86, you have it backwards, you don't want a dry kit, you want a wet kit. the wet kit uses fuel and nitrous into the nozzle whereas dry only uses nitrous and is for EFI bikes that can compensate to a point with the stock injectors. if you are building a kit, you will need a nozzle, jets, line, fuel pump, NOS and fuel solenoids, relays, on/off switch and a battery. you will be running the NOS off of a precharged battery unless you have an aftermarket stator that has the beans to keep a battery charged. as far as being simple, its impossible to make it a 5 min swap to take it off or put it on. the best place to put the nozzle is directly behind the reed cage in the intake boot(between carb and reeds), you cannot run carbon reeds with NOS as the freezing effect will cause them to crack and break, use fiberglass. also you might want to run some HD clutch springs, but if your clutch kit is fairly new you should be fine, stock clutchs can handle ~45hp to the rear wheel with no problem. dont try a sneaky pete or one of those 20$ ebay kits, it will blow the reeds out of your motor, possibly cause a fire or explosion, and it will instantly bog your motor down with no power boost at all. i've seen it done.
1985 Honda ATC250R drag trike with s/t kit and full drag CR hybrid motor and drag chassis...
1986 Honda ATC250R daily rider fully modded engine, +4 swinger,etc...
1997 Polaris Storm 800 triple, boyesen reeds, dg individual silencers, 240 studs, 123mph on radar...