The track is somehow new, opened in 2004, and it is designed specifically for Bikes. I think we are lucky we have this track, wishfully, it opens more for car track days.
As far as mods, the most beneficial mods as follow:
Oil cooler
brake and clutch ss lines with rbf600
brake pads
the starvation has a cheaper fix, fill it up
but as you get faster in turns, you will experience it earlier, myself, I get it at 2/3 mark with street tires, so I needed it badly and bought it before upgrading tires.
Other mods will keep the car cooler and to use it continually, but oem brake pads are just awful if the track has fast straights, I tried different cars at track and the Z has the worst brakes, it get better with brake fluid and pads.
Other than that, swaybars could do a great job in changing the handling, I wasn't able to have less than 2:37 because of excessive understeer, changed rear sway to full stiff, and dropped 3 seconds, with room for better lap time.