I installed the CB radio on my 2009 SERG, and now the bike must be in neutral to start. However, my issue seems to be a self-inflicted wound. Unfortunately, not my first, and probably not the last. I remembered the clutch interlock switch, and I vaguely remembered this thread, which saved me a lot troubleshooting time.
As stated, the CB kit required getting into the left handlebar control housing for the squelch switch. I ordered a lower half chrome control switch only rather than used the black replacement switch in the kit. My tech installed what I requested. I think I got the part numbers off of this site, but it really doesn't matter because I specified the parts to be ordered.
It now works bass-ackwards. It starts fine in neutral. It will not start in gear with the clutch engaged, but it will attempt to start (like prior to 2006) in gear with the clutch out and launch the bike forward! 
This is
exactly the same problem that I had. My problem came after having the dealer install the CB Radio and replace (only) the lower left switch housing with the matching chrome part that accommodated the PTT control. I had the same symptoms --
plus there were several things that were "screwy" each time I started the bike until the ECM threw the code about the clutch safety switch:
- Indicator light on the speedo was much slower to light up when shifting into 6th gear
- Cruise Control would not engage until the ECM threw the code
- Security light ("key") on the tach was always on -- even after the ECM threw the code.
If I'm not mistaken, LarryB had the same problem after installing the CB Radio himself.
I'm guessing that the lower left switch unit came with one of the pre-2009 clutch switches. The good news it there is a lot less angst because I know I an start it in neutral and I have a good lead on how to fix it.
Replacing the clutch safety switch with a 2009-model switch solved my problem, too. It seems that the logic in the clutch safety switch was reversed in 2009. This kind of switch is either (a) always "on" and activating the switch -- i.e., squeezing the clutch -- turns the switch off
or (b) always "off" and activating the switch turns the switch "on". Apparently, through 2008, they used one type of switch and starting in 2009, they changed to the other.
It never occurred to me that the clutch safety switch might have come pre-installed in the housing. If that is the case, then that would explain the situation. In fact, if the communications kit for the CB Radio (which includes a black, lower-half, left hand control) or the chrome lower-half left hand control (purchased separately) came with the wrong switch pre-installed,
!!VOILA!!, then this problem is likely to happen for anyone installing a CB Radio unless they know to order the 2009 clutch safety switch and replace the pre-installed unit as part of the install.
Interesting...