Harley Davidson Forums

Milwaukee Eight (M8) 2017 and up M8 Air and Liquid Cooled discussion
Sponsored by:
Sponsored by:

M8 problems

Thread Tools
 
Search this Thread
 
Old Nov 7, 2017 | 06:30 AM
Share
  #1101  
r0de_runr's Avatar
r0de_runr
Road Warrior
Veteran: Army
15 Year Member
Liked
Community Favorite
Joined: Oct 2008
Posts: 1,570
Likes: 644
From: Center Point Texas
Default
Originally Posted by perki48
Just curious as why a "bone stock" bike that will out perform MOST of the modified Harley's on the road is a problem?
You don't really believe that do you?
 
Reply
0
Old Nov 7, 2017 | 07:12 AM
Share
  #1102  
LowRiderGuy's Avatar
LowRiderGuy
5th Gear
Joined: Oct 2017
Posts: 9
Likes: 1
From: Central New Jersey
Default
It had a black rubber cap, but otherwise it was just hanging there
 
Reply
0
Old Nov 7, 2017 | 08:24 AM
Share
  #1103  
teedoff65's Avatar
teedoff65
Seasoned HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2017
Posts: 5,749
Likes: 1,603
From: High Point, NC.
Default
Originally Posted by LowRiderGuy
Found this connector behind the left side cover of my ‘18 Low Rider....anyone know what it’s used for?
I think thats the data cable connector to your ECM. Not sure what its called. Thats where you would hook your tuner up to install a new tune. Not sure it should just be hanging there though. Mine slides onto a little clip to keep it secure until you need to use it.

I think.......
 
Reply
1
Old Nov 7, 2017 | 08:29 AM
Share
  #1104  
splattttttt's Avatar
splattttttt
Ultimate HDF Member
Veteran: Army
Joined: Jul 2014
Posts: 5,649
Likes: 430
From: MASS_hole
Default
6-PIN HD-LAN Connector
older bikes have a 4-PIN
 
Reply
1
Old Nov 13, 2017 | 01:52 PM
Share
  #1105  
Fairkid's Avatar
Fairkid
Novice
Joined: Mar 2017
Posts: 17
Likes: 2
From: Peoria, AZ
Default
Well, back in the shop for the fifth time. Oil leaking on right side front cylinder mostly around the top and bottom of the push rod tubes....they've replaced the o-rings four times and I get about 1200 miles before it starts leaking again. Worse this time. Looks like the front cyl is either running way rich or burning oil. It's been 4k since they replaced the oil pump. Just waiting to see what they say about it this time.
 
Reply
0
Old Nov 13, 2017 | 02:25 PM
Share
  #1106  
Wizardofaus's Avatar
Wizardofaus
Road Warrior
Joined: Apr 2017
Posts: 1,451
Likes: 230
From: United States
Default
Originally Posted by teedoff65
I think thats the data cable connector to your ECM. Not sure what its called. Thats where you would hook your tuner up to install a new tune. Not sure it should just be hanging there though. Mine slides onto a little clip to keep it secure until you need to use it.

I think.......
⬆️ What he says

Wiz
 
Reply
0
Old Nov 13, 2017 | 02:29 PM
Share
  #1107  
Wizardofaus's Avatar
Wizardofaus
Road Warrior
Joined: Apr 2017
Posts: 1,451
Likes: 230
From: United States
Default
Originally Posted by Fairkid
Well, back in the shop for the fifth time. Oil leaking on right side front cylinder mostly around the top and bottom of the push rod tubes....they've replaced the o-rings four times and I get about 1200 miles before it starts leaking again. Worse this time. Looks like the front cyl is either running way rich or burning oil. It's been 4k since they replaced the oil pump. Just waiting to see what they say about it this time.
🍋 law
Ask for a new ride or ya $ Back ...
How many times is enough ?

Wiz
 
Reply
0
Old Nov 13, 2017 | 04:31 PM
Share
  #1108  
splattttttt's Avatar
splattttttt
Ultimate HDF Member
Veteran: Army
Joined: Jul 2014
Posts: 5,649
Likes: 430
From: MASS_hole
Default
Originally Posted by Wizardofaus
🍋 law
Ask for a new ride or ya $ Back ...
How many times is enough ?

Wiz
when ever I hear about this particular issue, two things come to mind. One being tolorence issues. Either fastners? Or improper tension sequence during assembly.
The other something relating relating to pressure. Either relating to oil pump being most obvious. Don’t ask how or why I came to that conclusion LOL. Other being some clogging somewhere and causing pressure to build.
Front cilinders generally run cooler and so heat’s probably not an issue. Hey also first in line of oil passge, so could be the rear is ‘t getting enough and may cause burning due to low pressure in back.
 
Reply
0
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-1

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-2

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-4

Killer Custom's Jail Break Is The Breakout That Refused to Blend In

 Verdad Gallardo
story-5

Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

 Verdad Gallardo
story-6

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-7

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-8

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-9

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
Old Nov 25, 2017 | 11:12 AM
Share
  #1109  
richyboy's Avatar
richyboy
Stage I
Joined: May 2017
Posts: 1
Likes: 0
From: Illinois
Default Check engine light
I left my ignition switch on after a ride on my 2017 Road King, well needless to say battery was dead. I didn't have a tender yet so I pulled the battery and charged it. Bike started up fine and ran good on a test drive. But now my check engine light is on.
Did this set off a code? Can I clear it myself or do I have to go back to the dealer?
Other than this I am very happy with the bike and have had no other problems so far.
 
Reply
0
Old Nov 25, 2017 | 11:28 AM
Share
  #1110  
sixguns's Avatar
sixguns
Grand HDF Member
Joined: Nov 2013
Posts: 3,807
Likes: 1,488
From: SW Washington State
Default
Originally Posted by richyboy
I left my ignition switch on after a ride on my 2017 Road King, well needless to say battery was dead. I didn't have a tender yet so I pulled the battery and charged it. Bike started up fine and ran good on a test drive. But now my check engine light is on.
Did this set off a code? Can I clear it myself or do I have to go back to the dealer?
Other than this I am very happy with the bike and have had no other problems so far.
you can do it. follow the instructions on this link
https://www.fuelmotousa.com/p-29661-...es.html#pcodes
 
Reply
1



Advanced Search
Reply Closed Thread Share
Forum Jump

All times are GMT -5. The time now is 06:48 PM.

story-0
7 Times Harley-Davidson Chucked Tradition Out the Window

Slideshow: Harley-Davidson built its reputation on nostalgia, but every so often, the company took a hard left turn into the future.

By Verdad Gallardo | 2026-05-20 11:18:19


VIEW MORE
story-1
7 Surprising Harley-Davidson Products that Are Not Motorcycles

Slideshow: The bar-and-shield logo shows up on far more than motorcycles, some of the company's most unexpected products have nothing to do with riding.

By Verdad Gallardo | 2026-04-29 16:50:35


VIEW MORE
story-2
8 Best Harley-Davidson Motorcycles Ever

Slideshow: Not every Harley gets it right, but these are the ones that genuinely earned their reputation.

By Pouria Savadkouei | 2026-04-15 14:23:21


VIEW MORE
story-3
10 Worst Harley-Davidson Motorcycles Ever

Slideshow: From the troubled AMF years to modern misfires, these bikes earned reputations for reliability issues, questionable engineering, or disappointing performance.

By Pouria Savadkouei | 2026-04-01 20:01:09


VIEW MORE
story-4
Killer Custom's Jail Break Is The Breakout That Refused to Blend In

Slideshow: Killer Custom's "Jail Breaker" build focuses more on stance and visual aggression than mechanical overhaul.

By Verdad Gallardo | 2026-03-18 19:20:32


VIEW MORE
story-5
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?

Slideshow: The Swiss custom shop has taken a Harley Softail and stretched it into something so long and low that it looks closer to a rolling sculpture than a conventional motorcycle.

By Verdad Gallardo | 2026-03-07 16:15:30


VIEW MORE
story-6
Harley-Davidson Reveals Super Cool Cafe Racer Concept

Slideshow: Harley-Davidson's new RMCR concept revives the café racer formula with modern hardware-and it may be exactly the reset the company needs.

By Verdad Gallardo | 2026-03-04 12:23:37


VIEW MORE
story-7
Engraved Rebellion: Inside Bundnerbike's Glam Rock II

Slideshow: A standard cruiser becomes an intricate metal canvas in the hands of a Swiss custom house known for pushing Harley-Davidson platforms far beyond their factory brief.

By Verdad Gallardo | 2026-02-24 18:19:44


VIEW MORE
story-8
10 Motorcycles You Should Never Buy

Slideshow: There is no shortage of great motorcycles to buy, but we would avoid these ten.

By Joe Kucinski | 2026-02-19 14:50:51


VIEW MORE
story-9
10 Things Harley-Davidson Needs to Fix in 2026

Slideshow: Harley-Davidson's challenges aren't abstract; they show up in dropping shipments, shrinking dealer traffic, and strategic decisions that aren't yet translating into growth.

By Verdad Gallardo | 2026-01-13 18:33:17


VIEW MORE