I could see an attraction to a GEN III,
with a few simple mods done at the factory.
1) Widen the bore spacing by about 1/4 inch.
(That MIGHT widen the engine by 3/4 inch at the most,
and only at the cylinder for sure.)
2) Increase the bore by maybe 8mm.
3) Lengthen the stroke by another 5mm.
That would allow a factory displacement
of 1,742cc.
Since we know we can overbore today's Hayabusa by 4mm,
we could have the bike up to about 1,900cc with little expense.
A small additional stroke of 4mm,
allows a displacement of over 2000cc.
If a STOCK 1300 will run 192 MPH (like mine did @ Maxton),
could a "prepared" 2000cc variant post 300HP and 270 MPH
WITHOUT a turbo, and plenty of running room ?
A decent GEN I, so many years ago, might show
165 RWHP on a good dyno, Increasing for a 10%
drivetrain loss, that would be maybe 185 crank HP.
If the volumetric efficiency stayed the same
(not a sure bet, but we've got 15 years
more technology in hand)
that would be 250 HP
in street legal trim.
No Blower, no baloney.
in 2000cc form, same assumptions,
2000cc = 275 HP
Please lord, pick me !