Join Date: Sep 2009
Location: An hour southwest of Boston, MA, USA
Re: Adding CB and NAV to 05 KLT
I definitely had the exact same audio system setup as you.
I believe the BMW Aux-in cable is the right part (a search on these forums should confirm it though - I didn't keep the original bag the one I bought came in so I have no way to find the part number). You'll likely also need an amplifier between the input to the Aux and the plug that goes in the back of the BMW radio, as most MP3 player units are not loud enough to get volume that you'll hear above 30mph. I used an Amplirider ($63 shipped, and I have zero affiliation or friendship - just went on others who said this worked) which works well. I had to cut the new BMW Aux-in cable and run one end to the Amplirider (in) and the other from the Amplirider (out) to the BMW stereo plug that came with the cable, which connects at the inside back of the stingray. That will get you Aux-in for the system you have. I also wired my GPS (Zumo 660) to that since the Amplirider has 3 inputs and mixes to one output, and I can hear the GPS (which also has a built-in MP3 player) on the bike speakers through the Aux-in. It's still not quite as loud as the CD or radio but it is loud enough to hear well at 65mph. I can't push the Amplirider volume higher to adjust for this as it overloads the input and distortion starts.
In addition I built my own unamplified mixer to run the aux-in and the GPS to my hard-wired Starcom1 intercom, which has the GMRS 2-way connection that works very well (I can hear in my helmet, not on the bike speakers). I added a switched relay circuit to this mixer (4-pole relay required - from eBay) so that I could turn the Aux-in and GPS/MP3 Player off from reaching the headset if I choose. Lastly I custom built a volume control for my Starcom1 intercom headset (i.e. volume to the helmet) and mounted that in my oddments box in the Stingray.The wiring harness is fairly large and I had to run that down the left side of the fuel tank along the seat post and into the area under the seats. This took a while to get right.
What you're talking about is all possible, but there's a bit of work involved, and when my other LT buddies saw what I was doing and they both said "no way - that's way beyond me". One of them, who has an '02 LTE with built-in intercom, FRS/GMRS and CB capability, commented "you basically made an LTE out of your '05 - cool!
So after all that, if I didn't have within $100 of what I needed, I would have looked at the Sena and CB/GMRS option for sure and maybe just added the Aux-in part alone.
Hope this helps.
2005 Dark Graphite Metallic BMW K1200LT
2002 Pearl Orange Honda VTX1800 Retro
Suzuki GS425E (Australia)
Suzuki T250R (Australia)