Re: CB Probelm
I had the same problem on mine, although it's not the BMW-brand for the LT it's the Motorola. Local CB guy tuned the antenna and I replaced the cable from the ant. to the radio (cheap quality); with those 2 fixes, the squeal is now only on high power. Local CB guy had said at first the mic was shorted but we tried the other helmet's mic and it squealed too.
The mic does not have a gain adjustment but I have adjusted the vox level on my intercom (Intaride EVO) and that seems to have helped.
Avatar credit: Curtis Callaway, 2009
Rider of Stahlross
1999 Basalt Grey LT
2001 Classic Red Ducati 748