Buying an '06 GSX-R600 - Any advice from owners out there?

[Research Monkey]

Its really easy to yank it out.  Since you're buying a track bike he might already have it out.

[Speeddog]

Damn near 10 years ago, I saw an EXUP valve on an FZR1000 fill in a dip in the power curve.
This was a back-to-back test on a dyno, valve enabled/disabled.
YMMV.

[derby]

Damn near 10 years ago, I saw an EXUP valve on an FZR1000 fill in a dip in the power curve.
This was a back-to-back test on a dyno, valve enabled/disabled.
YMMV.

my '99 r1 was the same way, but:

http://www.gixxer.com/forums/showthread.php?t=97184

[Speeddog]

That's good info. 

The valve could well be controlled by a pretty sophisticated map, so part throttle stuff may be different.

Try it both ways and see how you like it, it's not an expensive experiment. 

I'm sure Suzuki puts it on there for *some* reason, likely noise and emissions are high on the list.
If the race teams aren't using 'em, that's the best answer of all.