So here's my problem...
2014 M1200S with 24,000KM on the odom.
Everything works well... until I hit the power on hard (say to pass on highway).. the front cylinder then stops providing power... runs like a one cylinder thumper. She can still power me off to a safe location but not happily. I know it's the front cylinder because I've check a few time the heat from the headers and the front is always colder then the rear.
I stop, kill switch the engine, wait 3 seconds, press start and she purrs back to life with both cylinders like nothing is wrong.
Doesn't happen all the time, but it started this late this spring. First time I noticed was when I just rolled into the parking lot at work, no hard pull being done. Second time was on highway when trying to over take, then I really knew something was wrong because I lost significant power. It has happened about a total of 6 to 8 times, she's my daily driver to get to work. Out of all the times it happened the check engine light has appeared about 3 times. Of the 3 times, I only saw the dash spit out a code once and it didn't stay on for long (and yes I didn't memorize it).
Asking some mechanic friends and biker friends, most said it sounded like a coil issue. Research online has provided very little info for the M1200S dropping the front cylinder compared to older models of the monster because of coil issues, but the logic to the problem was sound.
So I replaced the coils with a used set from a 2017 M1200S hoping this would solve the problem.... sadly it hasn't. Rode a week with no issues until today. Both coil rails gave almost the identical Ohms when tested. I have yet to test the cables but pulling the bike apart is a longer job I currently have time for seeing that I use the bike daily.
I've pulled 2 of the 4 plugs (side plugs) to check their gaps, one was at 0.86mm the other 0.91mm so within spec. I've ordered 4 new plugs regardless, even if the plugs are rated to 50K miles. https://www.ngk.com/product.aspx?zpid=9900
But I really don't believe this will cure the problem as it doesn't have logic to be the cause, because the issue is intermittent and I don't think 2 plugs would fail on the same cylinder.
I've got the shop and parts manuals and have been racking my brain as to what would cause an intermittent problem such as this. I'm still thinking it's an electrical issue, as fuel or air would just to me not be as intermittent... so either the injector or ECU (seriously hope not). So far searches on both have provided nothing.
And yes I do plan on going to the dealer and having the codes pulled, but thought I'd throw this puzzle onto the forum to see if others might have some ideas of what to check.
Thanks for any help.