These graphs don't seem to show anything, they look damn close to identical to me. My subjective experience is that after installing a jet kit the power is a lot smoother and there's a lot more of it at low and middle RPM's. The top end is stronger, but that's not the biggest difference.

Hawk Factory stage 1 jet kit contains:


90GT650-After-Jetkit.jpg
Sun Oct 29 12:25:14 2000
original - 563 kB

90GT650-Before-Jetkit.jpg
Sun Oct 29 12:24:53 2000
original - 535 kB

all.jpg
Fri Sep 14 12:18:24 2001
original - 70 kB

factory-blue-sheet-bw.jpg
Fri Sep 14 12:18:29 2001
original - 163 kB

factory-blue-sheet.jpg
Fri Sep 14 12:19:00 2001
original - 162 kB

factory-pink-sheet-back-bw.jpg
Fri Sep 14 12:18:54 2001
original - 81 kB

factory-pink-sheet-back.jpg
Fri Sep 14 12:18:51 2001
original - 90 kB

factory-pink-sheet-bw.jpg
Fri Sep 14 12:18:41 2001
original - 276 kB

factory-pink-sheet.jpg
Fri Sep 14 12:18:48 2001
original - 251 kB

guts.jpg
Fri Sep 14 12:18:31 2001
original - 78 kB

Here is the setup sheet for the stage 3 kit:

The red and black/white ones are the same, I just took the color out so it's easier to read.


stage-3-red-bw.jpg
Sat Jun 7 15:02:59 2003
original - 177 kB

stage-3-red.jpg
Sat Jun 7 15:03:13 2003
original - 153 kB