I replaced the radio with a CB model. The factory said it could not be done because the main wiring harness was different - it was, 7 wires are different. Hard to imagine what that engineering discussion sounded like. "Lets make this wiring harness unique for 1600 bikes!" Oh yeah, anyways - the stock radio has a 4 pin pigtail that connects to the changer out the back of the radio. This pigtail defeats the 1/8" stereo pin jack on the front. You actually can connect a set of wires to the pigtail to accomplish your objective of connecting the iPod (you can purchase the opposite sex connector at your dealer and solder a couple of wires on to it). My approach was to install the HDI CB compatible radio, build the necessary wiring harness, put an new interconnect harness in and get myself all the functions of an Ultra radio. Cost about $1000, I acquired most of the parts on eBay. Now I run a 1/8" pin jack extension from the left glove box through the fairing and into the front of the radio. Works GREAT and I have the CB capability AND I can hear the radio, iPOD and CB through my helmet J&M ear speakers. I love it!!! I have also tried the Cassette tape, their price ranges from a few bucks to $50. The cheap units often work poorly (but some expensive one don't perform much better so be cautious). I also have the iTrip adapter - can't say it works well, low fidelity, often gets overriden by an adjacent stations and I have had lots of problems selecting the frequency without the iPod hanging. However it does work for about $35. I absolutely love the my system now, lots of music, no CD Changer taking up space in the tour pac (replaced 3 changers on warranty and extended warranty already). OK I ride a lot, over 70K miles on the FLTRSEI2 and still going strong. For sure the iPOD is the way to go.