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

New engine new problems

Thread Tools
 
Search this Thread
 
Old May 9, 2017 | 11:28 PM
  #21  
RoadGlider2's Avatar
RoadGlider2
Stage IV
Joined: Apr 2017
Posts: 4
Likes: 1
From: Tampa, FL
Default

Originally Posted by rjjj629
Wouldn't that be really really really bad for the engine? Like almost voiding warranty kind of bad?
The Sunoco 100 octane gas is unleaded and is safe for catalytic converters and oxygen sensors. I did my homework. Select Sunoco gas stations sell it.
 
Reply
Old May 10, 2017 | 01:28 AM
  #22  
FLTRI17's Avatar
FLTRI17
Stellar HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2009
Posts: 2,114
Likes: 666
Default

...and the engine loves the 100 octane! Better throttle response, cooler running, and all round happier running bike with a pleasant sniff of race fuel.
Bob
 
Reply
Old May 10, 2017 | 10:45 AM
  #23  
Jmccathern's Avatar
Jmccathern
Novice
Joined: Mar 2017
Posts: 16
Likes: 4
From: Ardmore Oklahoma
Default

Originally Posted by falconpilot12
Haven't noticed any noises under hard acceleration, but I have noticed an inconsistent sound in the primary area, when idling that sounds like a marble or steel ball jumping around. It's not bad or loud or regular or constant. Barely noticeable if you are not listening. Service writer at dealer says "oh yea, I can hear it" and goes and gets one of the main mechs. He says it's the primary chain tensioner and not to worry about it. Don't hear it above an idle. I have had several Harleys over the years and know that Harleys each have unique noises and understand that. This one is different. Thoughts anyone?

2017 RG Ultra 1200 miles.
I had the same issue on my 17 Road King. I was stressing over it. I only heard it at idle. I leaned down to listen while using the floor board as a handle. Noise went away. I felt really stupid that I was obsessing over my floorboard rattling.
 
Reply
Old Aug 15, 2017 | 10:11 AM
  #24  
sumncguy's Avatar
sumncguy
Stellar HDF Member
Veteran: Navy
15 Year Member
Liked
Community Favorite
Joined: Aug 2006
Posts: 2,152
Likes: 406
From: Hurdle Mills NC
Default

I might have mentioned this before. THe shell station near the house is now offering 93 no corn gas.

Since starting to use that, pings have decreased. Im considering carrying octane boost for the times when I cant get the "good stuff".

Also back just back from Arkansas. Strange clanking after the bike sits over night .. during first start of the day.

and the electronics are hosed again .. might have gotten wet during the trip riding thorough heavy rain.
BOOM acting weird and the oil light is intermittently on again.

See my "oil light breathe" post
 
Reply
Old Aug 15, 2017 | 01:05 PM
  #25  
Keithhu's Avatar
Keithhu
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Sep 2009
Posts: 17,148
Likes: 6,170
From: SE Michigan
Default

I really think people are hearing valve train noise, not pinging. A lot of people trying non scientific "remedies" which are subject to psychological bias.

Has anyone put a power vision on it and monitored for knock events?

That will give you a difinitive answer, no guessing or speculation
 
Reply
Old Aug 18, 2017 | 06:32 PM
  #26  
rodhotter's Avatar
rodhotter
Tourer
Joined: May 2006
Posts: 354
Likes: 13
From: pennsylvania
Default

i get my premium top tier 93 octane in containers after i purge the hose in my pickup. read articles that said only a qt in a one hose system but i pump a gallon first before getting fuel for my bikes!!
 
Reply
Old Aug 18, 2017 | 09:39 PM
  #27  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,672
Likes: 11,459
From: State of Confusion
Default

over 12 K miles and never heard mine ping once that I can recall..pretty much 91 and 92 octane..have a really good Stage 1 tune and have had a few trips of 100 degree temps and high elevations..couldn't be happier with the way it runs
 
Reply
Old Aug 18, 2017 | 11:38 PM
  #28  
lh4x4's Avatar
lh4x4
Extreme HDF Member
Joined: Dec 2007
Posts: 13,402
Likes: 941
From: Illinois
Default

I put 10K on mine so far and no pinging and no issues. I also run 87 octane E10 from day one with it.
 
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 Aug 19, 2017 | 08:39 AM
  #29  
PDB17UltraRG's Avatar
PDB17UltraRG
Ultimate HDF Member
Joined: Nov 2016
Posts: 6,697
Likes: 774
From: Stuart, Fl
Default

I did experience some pinging with my 17 Road Glide put 6000 miles on her and traded it back for a Electra Glide ultra Classic. No problems with the Ultra Classic it's actually much quieter and tranny is so much smoother. Plus i was losing tranny fluid to the primary on the Road Glide sor far not the case with my Ultra Classic.
 
Reply
Old Aug 19, 2017 | 09:18 AM
  #30  
lp's Avatar
lp
Seasoned HDF Member
20 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2006
Posts: 11,475
Likes: 3,001
From: Charleston, SC
Default

Mine will ping if I grab a massive hand full of throttle at low RPM. Does it more on cheap gas.

There is something to be said about using higher octane gas; use it for max performance. The cheaper stuff will make the pistons go up and down, but the higher octane really makes the M8 sing...

I proved this to myself on my last trip. Took the Beartooth and Chief Joseph hwy running 89 octane and the bike was pretty boggy without power. Took the same route with 91 two days later... big difference. Who knew.
 

Last edited by lp; Aug 19, 2017 at 09:21 AM.
Reply



All times are GMT -5. The time now is 03:41 AM.

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