I was really hoping that I would not be part of the Sumping crew, but I am now a card carrying member of the club. Rode my bike Saturday and all seemed fine with the exception of a cold weather starting issue I have. Got the bike on the HWY and within minutes, she started losing power. I had to crank the RPMs up to get her to keep momemtum. When releasing the throttle, it felt like I was engine braking the bike in 4th - 6th. Got off the Hwy and could smell burning oil and noticed a vibration that I had not felt on this bike before sitting still. Pulled into a gas station and checked my oil, it barely registered.

To to try to get in front of this issue, I had and external engine breather installed in the summer right afterreceiving my bike from the dealership. This helped to stabilize the oil pressure, but I guess there were other issues at play. My stage 4 was done prior to delivery.

Limped the bike home. Will be in Harley's Hands on Wednesday when they pick it up. Smh. Wish me luck!

I was thinking about this last night. My stage 4 was a hoot! If the engine is toast and Harley somehow compensates me for the Stage 4, I will hold off and do an aftermarket kit and install an S&s oil pump and plate at the same time. At this point, I'm just curious as to how they are going to handle this. I will certainly report back once I know more.

To the best of my ability, I was told by a builder that installing an external engine breather would at the very least, slow down the possibility of Sumping. He t'd off the engine breathers and connected it to a check valve, which went to a small catch can under my frame. He showed me the difference between the oil pressure with bike running without the check valve and after. There was a clear difference and the pressure was stabilized with the check valve vs constantly fluctuating without. I think his idea was that scavenging would be eliminated this way and keep the oil where it was supposed to be versus in the crank shaft. I wish I could tell you more, but I'm pretty new at learning this stuff.

Check!

Builde had a gauge that he used to show me. Not on the bike

Not much slop in mine at all, I guess the biggest benefit at this point was stopping excess oil from the air filter form splashing my right saddle bag.