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

M8 problems

Thread Tools
 
Search this Thread
 
Old Jan 30, 2019 | 03:29 PM
  #1641  
strangedave's Avatar
strangedave
4th Gear
Joined: Aug 2018
Posts: 8
Likes: 0
From: edinburg
Default Static sound from engine

I have a 2018 Softail Slim with the 107 M8. Between 1800 rpm's and 2200 rpms a static sound comes from the engine. Power isn't affected but the sound is odd. Anyone have an idea what it might be?
 
Reply
Old Jan 30, 2019 | 04:36 PM
  #1642  
QNman's Avatar
QNman
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2015
Posts: 6,863
Likes: 3,727
From: St. Charles, MO
Default

Originally Posted by strangedave
I have a 2018 Softail Slim with the 107 M8. Between 1800 rpm's and 2200 rpms a static sound comes from the engine. Power isn't affected but the sound is odd. Anyone have an idea what it might be?
Dumb question - what octane are you using?
 
Reply
Old Jan 31, 2019 | 11:07 AM
  #1643  
strangedave's Avatar
strangedave
4th Gear
Joined: Aug 2018
Posts: 8
Likes: 0
From: edinburg
Default

Always use 93
 
Reply
Old Feb 1, 2019 | 08:16 AM
  #1644  
QNman's Avatar
QNman
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Apr 2015
Posts: 6,863
Likes: 3,727
From: St. Charles, MO
Default

Originally Posted by strangedave
Always use 93
Ok, well... that's not it then!
 
Reply
Old Feb 2, 2019 | 01:24 AM
  #1645  
Wizardofaus's Avatar
Wizardofaus
Road Warrior
Joined: Apr 2017
Posts: 1,451
Likes: 230
From: United States
Default

Originally Posted by strangedave
I have a 2018 Softail Slim with the 107 M8. Between 1800 rpm's and 2200 rpms a static sound comes from the engine. Power isn't affected but the sound is odd. Anyone have an idea what it might be?
What oil are you using, have you changed anything?
Post a video or sound clip.

Wiz
 
Reply
Old Feb 21, 2019 | 05:58 PM
  #1646  
Sluggo1750's Avatar
Sluggo1750
Stage I
Joined: Feb 2019
Posts: 1
Likes: 0
From: Massachusetts
Default Clutch Switch ?

Originally Posted by billyo00769
My 2018 road king idle surges from 950 to 1200 just before stopping. Every time. Stage one SE exhaust and intake installed at time of purchase (6 months ago)
I have noticed the my 17 Road King idle surges when rolling up to a stop with the clutch pulled in. Once I stop completely or put it neutral as I am coasting down hill in traffic, then the idle is always smooth (I can put it back into gear and the surging returns). My clutch safety switch was intermittent in 17 and stopped working all together last year so in addition to not being able to restart quickly if I were to stall on takeoff, I have noticed this problem as well. If you find your bike is also not starting in gear you may want to look up Service Bulletin M1468: 2017 - 2018 Touring and Trike - Clutch Switch Update and square this away first. Its a new left hand control module and clutch lever that seems to be more reliable than the original. I have 33k now and have not been back to the dealer yet since buying my bike it but a few members of my local HOG group have had this switch replaced several times until the new one came out and it hasn't been an issue again for them. Guess I'll let them change it out for me next month when I bring it in for the hydraulic clutch recall.
 
Reply
Old Feb 26, 2019 | 08:47 AM
  #1647  
JONNIEROCK's Avatar
JONNIEROCK
Road Master
15 Year Member
Photogenic
Joined: Oct 2009
Posts: 861
Likes: 136
From: Wisconsin
Default

My question is, does the sumping, and migrating tranny fluid to the primary include all models or just the touring ?
 
Reply
Old Feb 26, 2019 | 09:03 AM
  #1648  
Heatwave's Avatar
Heatwave
Member
Joined: Jul 2009
Posts: 4,310
Likes: 1,079
Default

Originally Posted by JONNIEROCK
My question is, does the sumping, and migrating tranny fluid to the primary include all models or just the touring ?
All M8 Models are included for sumping potential in the latest (Aug 2018) SB1450 for model years 2017 & 2018. Based on reports in HDForums, the incidence varies by model and engine upgrades but all M8 models and engine types have had reports of sumping.

You can find all the models identified by HD for fluid transfer in TA0022 below.
 
Attached Files
File Type: pdf
TA0022.pdf (261.3 KB, 223 views)

Last edited by Heatwave; Feb 26, 2019 at 09:16 AM.
Reply
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 Feb 26, 2019 | 10:29 AM
  #1649  
FatBob2018's Avatar
FatBob2018
Grand HDF Member
5 Year Member
Liked
Loved
Community Favorite
Joined: Nov 2017
Posts: 4,251
Likes: 3,134
From: Texas
Default

Originally Posted by JONNIEROCK
My question is, does the sumping, and migrating tranny fluid to the primary include all models or just the touring ?
The migrating transmission fluid issue is solely related to touring bikes. They have a hydraulic clutch, the Softails don't.

As for sumping, while it is technically possible for a Softail, it seems to be much more unlikely for a Softail to sump than for a Touring bike. It can and has happened (we have had exactly one report here of a Softail sumping in the 1.5 years they've been available) but it doesn't appear to be nearly as common on a Softail.
 
Reply
Old Mar 20, 2019 | 11:08 PM
  #1650  
17rdgs's Avatar
17rdgs
5th Gear
Joined: Aug 2017
Posts: 9
Likes: 0
From: Kansas City
Default Compression 70 front cylinder

Hello I am hoping someone can tell me best place to start , I was riding heard a loud ticking sound from front cylinder loss some power and pulled over. Had it taken to dealership they will not work on under warranty due to powder coating. They said the front has compression of 70.

My road glide 3000 miles on it, about 100 since powder coating. I took off rocket heads and push rod tubes. The bike will be delivered back here tomorrow. Is there a test I can do to narrow down possible cause or do I just need to remove rocker cover and see if I see a broken rocker and bent rod?

Thank you for any advice
 
Reply



All times are GMT -5. The time now is 07:43 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