I'm looking into a setup that would allow the use of my Yaesu VX-170 while I'm on the bike (85 K100RT). I currently have an Autocom Easi-Plus (9V powered/7 pin DIN) that I use for two-up intercom and music. My first thought was to build a patch cord (including PTT button) to connect the HT to the Autocom unit. The second idea was to bypass the Autocom unit and connect the HT directly to the headset in the helmet (again with a PTT button). Granted that the latter would be for solo use only.
In either case, the first step is to locate wiring diagrams, and identify the proper pin connections. I would be greatful for any information on the needed connections and/or suggestions that could simplify the process.