Sumping? Questiom
Banned
Joined: Mar 2008
Posts: 1,967
Likes: 206
From: Jax FL
here's the Matrix:
1) do you own a M8?
yes - go to question 2
no - go to question 3.
2) are you on HDF?
yes - go to question 3
no - go to question 2.
3) everyone hates M8's
go to question 2
FWIW, i think the 107's had a problem, but the 114 problem was more pronounced, because ppl paid more for the CVO's bikes, which was the only way to get a 114 the first few years.
1) do you own a M8?
yes - go to question 2
no - go to question 3.
2) are you on HDF?
yes - go to question 3
no - go to question 2.
3) everyone hates M8's
go to question 2
FWIW, i think the 107's had a problem, but the 114 problem was more pronounced, because ppl paid more for the CVO's bikes, which was the only way to get a 114 the first few years.
Club Member
Joined: Feb 2013
Posts: 9,806
Likes: 8,705
From: Edmonton, Alberta
Ask the guy on the forum who had three stock 107's sump on him
Road Master
Joined: Jan 2016
Posts: 1,143
Likes: 433
From: Menifee, CA
"Sumping" has been associated with a variety of engine failures. Looking through sumping-related threads reveals this very clearly. It isn't just some amorphous nobody-knows-why characteristic of poor engineering and design. Almost all instances of sumping are related to a component failure inside the engine. A failed oil pump. A defective case (hole in it). A failed balance gear. A blocked oil or breather passage. Etc.
I believe this is why most of the sumping cases are related to "upgrades" done on otherwise perfectly fine engines, and done poorly. One guy here recently called for a class action suit against Harley because of this and other problems, and then a few weeks later revealed that his sumping was cause by a screwed-up "upgrade."
Some engines have sumped even though there had been no "upgrading" on them. These are rare, extremely rare. And probably result from faulty assembly at the factory. Sometimes things leave the factory defective. But it is extremely rare.
I believe this is why most of the sumping cases are related to "upgrades" done on otherwise perfectly fine engines, and done poorly. One guy here recently called for a class action suit against Harley because of this and other problems, and then a few weeks later revealed that his sumping was cause by a screwed-up "upgrade."
Some engines have sumped even though there had been no "upgrading" on them. These are rare, extremely rare. And probably result from faulty assembly at the factory. Sometimes things leave the factory defective. But it is extremely rare.
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,144
Likes: 6,166
From: SE Michigan
Had 3 stock 107's replaced under warranty.
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HDF Community Team
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