Forgive my ignorance. been riding 40 plus yrs. Have a 2019 ultra limited coming in June. Reading of all this sumping has me second guessing myself. I currently have a 16 limited.
What exactly is sumping?

 

 

Ok so only green road glides sump
Got it

 

I also wish I knew more about it. There’s a YouTube guy who says it only happens to stage 4 bikes. Some posters here experienced it with bone stock bikes some bikes do it. Most don’t. What the heck? What’s the common denominator?

 

I wouldnt sweat it. Harley engine crankcases are a "dry sump" design, meaning the oil should be pumped out of the crank case and back into the oil pan. In rare cases, oil is not being pumped out, causing the flywheels to travel through too much oil. Bad juju ensues - loss of power, starvation of oil to other parts of the engine, etc etc

 

Lots of threads about sumping. I'm curious about recognizing the bogging.

Is it real obvious? Like if the timing was off on your car or had a wire off one of the plugs?

Or is it something you need to look for. "Am I sumping, I think I'm sumping" LOL

Does oil ALWAYS come out the air filter? No oil, No sumping?

 

For example, at highway speeds, you hit the throttle, it groans but does not accelerate. Also smells like burnt oil

 

So now common dominator not advance warning? When it happens it happens? What's the damage done? I'm not making any mods for fear of voiding the warranty.
So I'll just get the esp. it has saved me twice before.

 

Happened to me 3 times rolling down the highway. Funny smell, tried to accelerate, bogging down, get off at an exit, smoke everywhere. 3 stock 107's gone and replaced (well, the last one they replaced the bike).

But I would say my case was definitely unusual, I wouldn't generalize from what happened to me. Hundreds of thousands of these bikes on the road, a tiny percentage have problems.

 

You just described my morning toilet life.