If you print off a copy of the wiring diagram, and delete all the lines to and from the lights, you'll find you can strip the loom down quite a lot.
You do need the gear position wires, and the TPS if you want a decent power curve.
The standard NSR battery is really small and won't last too long when you consider it will also be driving the powervalves, so if you do go total loss, use a bigger battery from something like a CBR400.
Personally, I doubt the charging gear saps more than 1hp, so is it really worth removing?
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