Check the facts and not the BS on the net. The net is not about truth but hype. Sumping is excess oil going where it should not. Yes some oil pump issue have caused it . When the oilers are not sealed /tightened as they should be the leak that oil ends up in the sump.
I know of a few that have been repaired under warranty.

 

Yeah, no.

I built my 120 with 1 mile on the bike, replaced the piston oiler gaskets with Cometic, handled the screw threads, used loctite and torqued to spec. Then installed cylinders and pistons that were accurately measured and it still sumped. Subsequent installation of the Feuling pump and plate solved it for me and has been the cure for 12k miles.

The assertion that the oilers are the sole reason for sumping is false.

Actual experience trumps theory every time.

 

So what do you think is different on the Fueling pump and plate over the HD pump/sealing plate...anything obvious that you noticed between the two?

 

And where would those facts be found? Not all dealers are forthcoming with the truth. The moco certainly isn't sharing. And as hattitude pointed out, there have been reports of sumping on bikes that have been "repaired" using a variety of "fixes".
My question was whether or not the bad seating of the oilers' bolts had been identified as "the" cause of sumping. To my knowledge it has not. Of course my sources toward that conclusion are like everyone elses, which is anecdotal "evidence" from the only places available to most of us, which comes from other owners.

 

It has a larger scavenge gerotor, but perhaps it is the enlarged passages between the pump and plate. The other thing that might help is the higher quality aluminum and tolerances that may help when things heat up.

I recall talking with Frank Drago about the stock twin cam plates having excessive leakage, so perhaps it plays a role.

While not certain why, all I can tell you is it solved my problem.

 

Ok thanks...just curious....

 

Not always.... In my case I had 3 M8 117 stage 4s that sumped. Each time the oilers were checked and they were properly seated and within the torque specifications. In my 3 sumped engines the oilers were NOT leaking.

 

Which 2019 M8 engine do you have? Is it factory stock or has it been upgraded?

 

What is that? A form of menopause?

 

..... an intrigant in an attempt trying to get people by his side , for committing a form of character murder = a nasty habit that often occurs on forums....

This kind of behaviour does not suit to bikers.
It's better to leave everyone in their own value....