The Harley-Davidson Motor Company issues service bulletins to their dealers. Service Bulletin SB M-1450 describes the sumping issue, and is now in its (at least) seventh release, clearly states that sumping is now known to occur in ALL STOCK Milwaukee-8 motors, 107 cu in, 114 cu in, and 117 cu in, in model years 2017, 2018, and 2019.

 

Yes they were prorated. I lost at least 500-600.00 on each warranty. I didn't take one on the 19. Who's going to remove handlebars? On the day I bought it while at Panama City Beach, I had my stock CVO seat re upholstered with the center section done in Orange to match the bike and be different. I put painted to match Yaffe license plate holders on my 16 and 17. Full Rinehart exhaust on my 17. My only saving grace on that was that it was installed at purchase and they let it slide.
When my 17 blew the 1st. engine I had already ordered the Stage IV kit and it was sitting at my dealer waiting for me. On the 18 CVO, It sumped the second day I owned it. The dealer was told to reproduce the condition and the service writer sumped it and continued riding it until it seized. When They built the new engine, They offered me a stage IV upgrade as a token of their appreciation I didn't strangle someone. Oh and after I got the Stage IV 18 back, the drive belt started losing teeth. Mind you, I was breaking this engine in as per the field reps instructions. I called the dealer, dropped it off and they told me it was abuse and it cost me almost 1,000.00.
At that moment I was beyond pissed. I shipped the bike to Florida to keep at a buddies house so we could ride all winter and our first trip to Key West it sumped again.
The rep had the factory build me the 19 CVO Mako Shark Fade Road Glide whish sumped at 300 miles. At that moment I gave up. I shut the bike down, let it cool and started it and let it idle for about 3-4 minutes and most of the oil went back into the sump. I gingerly road it back to my house I recently purchased in Daytona Beach and had a Fueling HP cam plate and oil pump installed in it. I only rode it for Daytona bike week since.
Memorial Day weekend I'm running it from Daytona to Long Island, NY. We shall see. If it starts to sump I will have the clean title with me and stop at the closest BMW dealership and trade it in.

 

I wonder if the MoCo hand builds or specially selects engines that are used for replacements. I have 1,000mi on my replacement engine and it's been perfect in everyway.
The original engine exhibited symptoms of sumping at 300mi and ended up failing at 1,100mi -- during that time it got about 40mpg, but other than the sumping symptons at 300mi, it ran ok.
Now that I have the new engine for comparison I can really feel the difference. The new engine is more responsive and continues to average around 43 to 45mpg.
I think the first engine had the piston cooling jet fall out early in its life and was dumping excess oil in the crankcase. It was just fortunate the jet finally got sucked into the oil pump prior to my appointment with Fuelmoto -- otherwise my warranty would have been toast.
Now I'm looking forward to my late May appointment for a 124 conversion.

 

I have a 2019 rgs and I'm doing the fat clutch rod and S&S pump with cam plate just to be pre emptive.