Weird Idle Problem

[gnostic203]

2006 S2R1000
10k Miles
Stock ECU
Full Arrows
No Airbox Mods
*Disconnected o2 Sensor*

So my bike has been running pretty sweet since I disconnected the o2 sensor about a year ago.  Recently however, almost at 10k miles on the button my bike has developed a weird idle problem.  When I come to a stop and put it in neutral the idle sticks at about 2k RPM for a second, then drops down below 1k RPM for second, then pops back up to about 1100 RPM or so and is fine.  Sometimes when it drops down below 1k it stalls.

TB sync?  ECU?  Any ideas?  I've been toying around with reconnecting the o2 sensor but I'd wonder why all of a sudden that has an issue.

[Speeddog]

Could be the idle air servo is sticking.

Or you've got an air leak.

Does it run good at small throttle openings, and does it run better when it's cold?

[gnostic203]

Definitely not noticeable when cold.  I usually notice when I get off the highway after riding 20 miles.  But after that the idle seems to stick bad then dip then return to normal.  I checked my tank lines to make sure they weren't crimped.

I'll have to look into this idle air servo thing, not sure what it is yet.