If you want to be a tight arse, you can order what you need individually. I found the main jets and pilot jets in the kit unusable with mods like yours, and still unusable with WAY more mods to it than most on this board.

I have all the HRC part numbers to the individual pieces in the kit if you need them. For mains, 150-160 is probably a good start.

I have an opened airbox, cut airbox divider, larger diameter connection tubes between the airbox and carbs, standard carbs, standard reed cage with HRC reed stuffers, Tyga carbon reeds, ported/epoxied cases, ported cylinders, 2mm overbore cylinders, and full Tyga exhaust. I am running Bakudan needles that mimic the stock NSR needles (but are adjustable), 38 pilot, and around 165 mains still retaining the powerjet setup. It is a bit rich right now, and I am about 400 feet above sea level.
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Paul Herr
'88 FZR4/GSXR/YZF Frankenbike
MY BIKE PICS