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93 R100R intermittent power loss on long trips

I had the same problem...ruled out carb problems because both banks were losing power... I tried loosening the fuel cap, no difference, so I figured it was ignition related. New spark plug cables...again, both cylinders...I finally figured it had to do with the new Dyna III ignition, maybe the ground to the box...tried wiggling the ground to the engine, it was tight, but...the problem hasn't recurred!

Something like that is almost always simple...like a ground wire not making contact. If both cylinders are affected, then ya gotta look for things up the line from carbs, coils, etc...both carbs or both coils aren't gonna usually go out and clear up at the very same moment!
 
thanks again

All of your suggestions are very helpful. JB, I'm going to wait on the ignition coil until I sort the carbs. I'm putting together an order for Bing Agency, and 1 for Max.

Wishing all of you the very best!
 
My problem came back over the last two days, but I loosened the gas cap, waited a few seconds, and the problem went away...As I recall, previously this didn't work, but hey, it's been several months, maybe this was my problem all along
 
Look for cracks in the ignition coil. If it is fuel tank related put your spare key in the fuel cap and the next time it does it loosen the cap a couple of turns and see if that helps.
 
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