Can you provide any links? I'm not quite sure what you are suggesting here.You can get UHF licence free walkie talkies at most decent radio stores or off the internet...forget CB frequencies...or ham equipment, use UHF 433 low power ( range up to 2-3 miles) get the ones with VOX and remote mic socket
Vox is voice operated transmit.
By using FM you will hear one operator at a time, even if two way up front are chatting and the biker next to you shouts you have a problem, you will hear him clearly as the stronger ( nearer) signal will override the reception of the weaker ones 100 yards in front. .as FM radios can only listen to one transmission at a time..the strongest one...Mounting is easy, have them clipped to the back of the helmet and use a remote mic inside the helmet. Don't wire up the call button, that would drive you mad and possibly suicidal after a few hours...BRINGG BRINGG !!! at full volume.
As the vox will need setting to the less sensitive setting ( high low) to avoid it transmitting every breath you take, just blow a "PHEUGH" to open the transmission then speak..if something bad happens and someone yells out, you will still hear "ucking hell what was that" you will just miss the first syllable....
these are the best solution and are light, work very well and are legal everywhere... battery can be rechargeable and you can have a 12 charger run from the bike.
I've been in comms a long time and this is the best solution for a pair or group of riders.. even if you fall off the bike you radio will still be with you and able to transmit your cries for help..