I was thinking on this the other day and looking at the radio ant on the bike now for the stereo. I was thinking of taking a regular ant like what is on the bike and cutting it down to 1/4 wave lenght for 2 meters and mount on the side where the cb ant goes.
Or buying the cb mount (the chrome one on the trunk) and taking a dual bander ant and installing the coax mounts from the comet dual bander ant I have and treading it up thru the base. Then all you need to do is thread the comet ant on. Looks a little different than the cb ant but gives you 2 or 440 meters. Or you could just buy a 2 meter ant and convert the stereo mount to accept the ant. I am going to experiment this winter.
I just bought a dual bander for my truck a few weeks ago a Yeasu 7800. It has a removeable face plate and you can intall the radio in the trunk and the face plate mounted on the pocket door with velcro, which then can be removed any time you wish.
Hope this helps get the creative juices flowing 73''.
Retired and enjoying my
06 1800 GoldWing