Powder bog
Hey fellow riders, I strongly believe your injesting snow, not exhaust problem. The fact that some guys have a bog on the right side too, is key clue here.
Start at the throttle bodies and work your way back to the frogskin covers. Look for any gaps or poor fitment in the intake plenum. Use silicon and those frogskin stick ons of various sizes they sell to cover holes.
I have an 06 king and there were tons of people complaining about right side bog on them and the 1m's. Everybody said it was the exhaust, cat even went to a front dump. I found two slotted holes above the foot wells on each side of intake plenum. Another hole big enough to stick a 2x4 through by the brake rotor. Not to mention the intake vents sloppy fit and the gaps between the dash and intake plenum opening on each side. A couple guys took their tool box lid off and found snow inside. That should have been the red flag its not the exhaust!
Guys, next time it happens, stop asap and look inside your intake for snow. It might be melted by the time you look, but any moisture is a clear indication of snow being sucked in. Good luck and don't forget to post your findings and how it was fixed so guys have a reference for future readings.