When I was looking for a Hondaline CB system I read the posts here and on the VRCC site on how to tune a CB antenna. My interest peaked once I installed the Hondaline system on my own Interstate. My system came with an aftermarket CB antenna. The base of mine is black but it does fold down like the oem radio antenna. The CB antenna is also about 5" longer than the oem radio antenna. I have to keep the squelch set at around 15 to keep from receiving short undistinguished bursts of 'something'. Tonight I picked up an SWR Meter at Radio Shack along with the adapters needed to connect the Honda system to the meter. I'll try to get my antenna tuned by this weekend and will be glad to help any other Valkyrie owner with yours as well. I'll practice on my own system before offering to test/adjust your system. There's also a decent video on YouTube showing what to do with the Radio Shack meter as well.
http://www.youtube.com/watch?v=jRWKZskxcs0All the best,
Mark