Modern voltmeters with extremely high input impedance can read voltages nearly through the air. You need to be careful how you measure things and think about what is going on. It's better to read the voltage drop across some load so you're not measuring 'air'. I'd measure everything from the positive ground, if you have a good ground on your bike. If your meter is that good, disconnect the battery and read the resistances at various points around the bike from the positive ground battery terminal. Discharge your MC2 before hand by grounding the neg lead (battery disconnected of course) for a minute or so, or disconnect the MC2. Your resistance readings should be below .5 ohms less is better, I think mine is around .2 ohms anywhere I measure. You might have to factor in the lead resistance which can be as much as .2 ohms, even on a good meter.
If you have 12 volts on your coils all the time, they will get hot.
If you measure things from the neg terminal on the battery, it's really hard to tell what's going on because you're starting off at a higher/lower than ground potential. You could probably measure 12V off your fingers from the neg terminal.
Dave
69S