The high revs made me think the charging system might have drained the battery - yielding electrical power only when the RPMs were above 4,000 - 5,000. When I checked for a depleted battery, however, she came back with 13.5 volts. I hooked up the trickle charge anyway, and it charged for <30 minutes before beeping to signal full charge.
Lat time this happened, I had a bad coil. This time, testing the coil resistances comes back clean. No shorts, all resistances in spec. In fact, I cannot seem to recreate the power loss, that started this (but it's too cold to ride much so . . . )
Here is what I can find. A significant voltage drop between the battery and the coils.
Battery is fully charged, shows these results:
13.5 volts key off.
12.75 - 12.90 volts with ignition on
10 volts at coils
Note that 2+ volt drop is with a coil relay. Wiring the coils through the harnes gives me a slightly bigger drop (about 3-3.5 volts).
I replaced the relay, and rewired the the link between battery to relay, and relay to the coils. Even with fresh wires, soldered connections, etc. I cannot get above 10 volts at the coils.
After seeing this problem in another thread, I triple-checked that I had the pins correctly wired for the relay. They are good.
So where else could my wiring be shedding that kind of voltage?
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