Phil,
I have an '06 Electra w/Cozy sidecar. I changed to the K&N cone filter but still have stock exhaust. I bought the kit from our hosts that has both main and pilot jets. I am currently jetted 117.5 main, 17.5 pilot, needle in stock position. When I do my oil change I plan to try raising the needle and may try the 120 main. It runs well but feels a little lean at mid throttle which I use a lot pulling the sidecar up our rolling roads. Hope this helps as a starting point.
Rick