Kip,
    I'm up in Durham, between Freeport and Auburn/Lewiston.  about 45 min North of Portland.  The "interference" I was questioning was the electrical type, so close to the frame, I would wonder if the bike would "behave" differently with an external wire.  Not saying it's bad, just wonder if there would be a difference, I'm sure you've had the pleasure of touching a plug wire on a running engine!  My last "touch" was a MSD crank triggered ignition, i seriously thought I was gonna Pee myself!! LOL
Mac