So there I was in the dark, no shoulder, pushing..

[Matt Chapter]

Last night I was out for a spin, and I was riding along about 50 or 60 mph when I had a sudden dramatic loss of power.  As soon as I coasted to a stop the engine quit.  The battery seemed to have a full charge, the motor turned over fine but wouldn't catch.

Plenty of fuel coming through the newish lines, I replaced the coil with a dyna coil about 4 or 5 years ago.. anybody have any thoughts?

The bike in question is an '86 with an '84 motor, and I just (about 150 miles ago) replaced the wiring harness.

[Bob_Roller]

Remove the spark plugs from the cylinder, place them on the cylinder fins .

Turn your ignition key on and off, every time you turn the key on, both plugs should fire, it's a quick test for your ignition system .

If you don't get any spark, you need to go back and check the wiring, some wire connection may have come loose .

[nhmaf]

I agree with Bob's suggestion - chances are good that you had a connector that wasn't firmly in place, and chose that moment to come loose.   Pay particular attention to the ignition key connectors and the connectors at the ICU and coil(s).

[Rob Valdez 79 R65]

And the kill switch.  Move that back & forth several times to make sure it isn't malfunctioning.

[Yikes]

Matt, your symptoms sound similar to my 2 bean can failures, due to dying hall effect vane sensors.  The sensor is not too expensive to replace but definitely a job to do on the shop bench and not a roadside fix.  

[Matt Chapter]

Finally had a chance to post the resolution.. apparently the loose nut fairy had been hanging around my R65 quite a bit. (You know the guy.. cold beer in one hand, wrench in the other, dumb look on his face..)  The battery connector had come loose, but even after that no dice.  I took the tank off and the ignition coil was very loose in the mount.  I just tightened it all back up and bingo! back in business.

Now that it's reasonable temperatures in Texas I'm loving the commute again.