No, item 4 was a hypothetical on my part.
Usually the clutch with Barnett kevlar plates and stronger springs is more than enough for street and track use with bikes.
You'd need a redesigned clutch basket and cover to accommodate a more plates.
So items 2, 3, and 5 are the practical choices.
Actually item 5 ('Busa motor) is the real choice if your rules allow.
If it will smoke the tires off a Mini or Smart car, then a buggy is no problem.