M8 revised oil pump - slumping fix
Thread Starter
|
Cruiser
Joined: Oct 2006
Posts: 137
Likes: 1
From: Louisiana
M8 revised oil pump - slumping fix
Heard HD revised the oil pump on the newer bikes due to slumping issues in the earlier models. The substandard oil pump was apparent with models with Stage + kits. Is this something we should watch out for in the older M8 if ours is slumping. Apparently, if the bike slumps resulting in too much oil around crank, it heats up really quickly.
Comments?
Comments?
Road Warrior
Joined: Aug 2015
Posts: 1,712
Likes: 410
From: Puyallup, WA
Heard HD revised the oil pump on the newer bikes due to slumping issues in the earlier models. The substandard oil pump was apparent with models with Stage + kits. Is this something we should watch out for in the older M8 if ours is slumping. Apparently, if the bike slumps resulting in too much oil around crank, it heats up really quickly.
Comments?
Comments?
Seasoned HDF Member
Joined: Sep 2009
Posts: 17,148
Likes: 6,170
From: SE Michigan
There have been several iterations of the oil pump. No indication that the latest version of the pump fixes the problem. (for example, version 4 came out on 9/20. My warranty replacement engine was ordered on 9/22. Warranty replacement engine blew up again on October 22).
So no, I don't think they've found a fix for the problem.
And its not limited to Stage 3 or 4. My bike was completely stock.
So no, I don't think they've found a fix for the problem.
And its not limited to Stage 3 or 4. My bike was completely stock.
Grand HDF Member
Joined: Nov 2013
Posts: 3,807
Likes: 1,488
From: SW Washington State
Thats what is not so great about the internet, you have no way to confirm if anything is factual, complete or incomplete information or just plain BS.
Road Warrior
Joined: Jul 2015
Posts: 1,512
Likes: 345
From: Ohio
There have been several iterations of the oil pump. No indication that the latest version of the pump fixes the problem. (for example, version 4 came out on 9/20. My warranty replacement engine was ordered on 9/22. Warranty replacement engine blew up again on October 22).
So no, I don't think they've found a fix for the problem.
And its not limited to Stage 3 or 4. My bike was completely stock.
So no, I don't think they've found a fix for the problem.
And its not limited to Stage 3 or 4. My bike was completely stock.
Trending Topics
Road Warrior
Joined: Oct 2012
Posts: 1,358
Likes: 220
From: Dallas
and starting a new thread on the subject is somehow gonna negate all that
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Seasoned HDF Member
Joined: Jan 2006
Posts: 11,475
Likes: 3,001
From: Charleston, SC
Zero cares.
Road Warrior
Joined: Jun 2017
Posts: 1,508
Likes: 238
From: Illinois
Well, you come here to learn, right? Its known as sumping. The oil cannot be scavenged and pumped back to the oil reservoir fast enough, thus creating a pooling effect in your crank case, which is bad. It has happened on some these guys bikes here in the forum. I have never had it happen, but it is a sudden power loss, I believe. Maybe someone in the know will chime in and give you better clarity. I hope this helps..........
Seeing jgos on this thread, I had to google scavenged 3 times to get the correct spelling on that word...... I did.
Seeing jgos on this thread, I had to google scavenged 3 times to get the correct spelling on that word...... I did.