Yes, they have crankshaft sensors.
12.47 to 12.25 in one minute is not a disaster, but it's not great, sort of inconclusive.
We still haven't heard what the battery voltage is right at the time of the spark quitting.
As far as jump starting, it's not a problem if the car's engine is not running. From a recent post of mine:
Quote:
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Under certain conditions, a regulator can be damaged while jump starting. One way it can happen is if the vehicle supplying the jump start is running and has a battery voltage higher than the set point of your bike's regulator. Then the regulator, which is a shunt type, tries to shunt current to ground, and since there can easily be more current available through the jumper cables than the regulator can handle, it fails.
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Does the 14.4 volts you measured while idling stay reasonably steady if you rev the engine a little, like up to 4,000 rpm?