As a matter of fact, the dealer I am mentioning received a cam plate prototype before it was released. I posted asking about it here and was told, there is no such thing and that even if their were it would be something different. So apparently they did partner with MOCO to test fixes.
If others believe me or don't. makes me no difference. however, each of the 3 dealers knew about the problem and the one I reference to having fixed several dozen (According to service manager) knew there was no one fix. When I called him the first time to discuss, he shared about piston jets, oil pumps etc..... He was very knowledgeable about the sumpping issue.

My first time to sump was after about 3 hours of riding in 95 deg temps with high humidity. The sump came when i was playing in the twistees going one way to the next spot while buddies were going a different way. When i came out of the twistees and hit the highway, the bike had lost a ton of power and smelled like it was burning oil.
Second time was me out pushing it hard after the first "could not replicate" diagnosis. Same conditions.

 

I posted this back in August and I mentioned the Cam plate.


Originally Posted by Fat11Lo
Sounds like you may have cooked it, not a bad thing IMO in your case. That, hopefully, should get you a whole new engine



That sounds more like a fix for the transmission oil migration issue, sumping is a whole different situation, although many are confusing the two and some bikes have both issues

Please keep us posted on how things go with the dealer
No he knew about the transmission migration issue too. He was very specfic and said a new cam plate. He talked about the possibility of it being piston jets being loose and / or the oil scavenging. He even said, the sumping is coming from a variety of issues and there was no one fix all for them. He even acknowledged Harley is chasing their tails on them. He knew the revisions of the oil pumps etc... seemed to be way in tune with the issues. The only statement he made to me that i dint like is they have not replaced an entire engine on one yet, no matter how hot they got. That the have replaced the pump, plate and top end and sent them out with no issues. Maybe mine will be a first on the bottom end. Hard to say.. I'll know more once they get into it Wed. I can't imagine the bottom end not being hurt. The burnt oil smell was horrible and was even coming out of the exhaust when It cooled enough for me to crank it.

 

it'll be interesting how 2019 unfolds after a Summer of bikes with the new seal ..time will tell is pretty much certain, whether a non issue anymore or not

 

Well, anything is possible, but during the summer we have similar temps and humidity as you. Hard to say. I wouldn't trust the dealers to give me the straight dirt on the statistics, but the M8 ridership in the area that I've met in my travels don't know of anyone that's had the issue. The world may never know. LOL.

 

When you mentioned this in the other discussion, it sounded like there was some confusion about what the cam plate was. Did you see it? The oil pump plate was changed. One thing to note is the cam plate has only a simple passage that connects the oil pump to the engine cases to feed the oil back to the tank for scavenging. I'm not sure what could cause an issue there.. Maybe the plate flexes and the oil pump looses seal on the scavenge passage?

The latest parts manuals (2019) show the same cam plate as the 2017.

 

I wonder if it was a similar issue the twinkie had where the plate was finicky to align on install and maybe the new one has locator indents or something.

 

The M8 plate has dowel pins. There is no alignment to worry about, but the proper torque procedures are critical.

 

Does it have alignment pins between the oil pump and the plate? Tcs don't but they do have pins between the plate and motor case.