I disconnected my batteries before I installed the new controller. I just feel that if there is no power going to the bike is nothing you can screw up. No I never turn the key on while it was disconnected but if there is no power there is no power there for the computer will reset. Unless I am missing something about the key being on please chime in and and let me know.
Mods: Cannella risers, FI2000PowrPro , Cobra Swept Exhaust,Cobra’s PowrFlo, Chrome Dipstick, Chrome Claw Mirrors, Tool pouch, LEDGlow ,Accutronix Chrome LED License plate light, Kuryakyn Handlebar Control Covers, Brake Master Cylinder Cover, Flamin' Switchblade Pegs