Don't mean to hijack the thread, I have a Starcom and very limited radio experience, but I found that the 2 way GMRS radios are compatible with the GMRS Chatterbox. On my
Cobra LI-6000 that I bought last year (Jeff's 7200 is a much better choice) the channels 1 thru 6 are the same on the GMRS Chatterbox, based on riding in a couple of rallies with friends with Chatterboxes. Actually the FRS side of the 2 way radios are compatible with the FRS Chatterboxes also. In the back of the user's manual the frequencies are listed, so if you know the frequencies of the channels on your set you can set the radios to be able to talk.
Midlands work also, as do Kenwoods. The choices are usually either 16 or 22 channels, and each has different channels and associated frequencies. That's why you need to know the frequencies inthe back of the user manual.
If you have a Starcom go to either Premier Cycle Accessories or Sport Bike Effects and they can help get you the correct PTT and cable to utilize the 2 ways. I am sure Autocom and the others all do the same.
Without a Starcom or J&M(?) or Autocom
this might be an alternative for a single pin jack radio, although a bit clumsy and might not fit under your helmet.
Sorry Heidi dunno about CB. Bet there is someone out there who does.
Back to your regularly scheduled exciting rally stuff...