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

Been a while. Question

Thread Tools
 
Search this Thread
 
Old Sep 21, 2021 | 06:37 PM
  #1  
Dark lo's Avatar
Dark lo
Thread Starter
|
Road Captain
Joined: Oct 2012
Posts: 545
Likes: 3
From: Empire State
Default Been a while. Question

What up good ppl. It’s been a while.
so I have a 21SGS that I bought in June of this yr. over the last month I haven’t rode as much as I want do to work so my bike sits for a week at a time. I noticed that both tires have lost pressure. This should not happen if it sits for a week or two! Anyone else having this issue with the 2021?
 
Reply
Old Sep 21, 2021 | 06:45 PM
  #2  
MURPHCC1's Avatar
MURPHCC1
Club Member
Joined: Apr 2013
Posts: 5,760
Likes: 3,756
From: Cape Cod
Default

so I guess you're still under warranty.......bring it back and let them fix it.........
 
Reply
Old Sep 21, 2021 | 06:46 PM
  #3  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,587
Likes: 11,281
From: State of Confusion
Default

Originally Posted by Dark lo
What up good ppl. It’s been a while.
so I have a 21SGS that I bought in June of this yr. over the last month I haven’t rode as much as I want do to work so my bike sits for a week at a time. I noticed that both tires have lost pressure. This should not happen if it sits for a week or two! Anyone else having this issue with the 2021?
I'm on my 3rd set of tires on my 2020 with TPMS..they have always stayed put, aside from the normal pound or two in big ambient temp changes..TPMS has worked consistently well..no issues with tire pressure whatsoever
 
Reply
Old Sep 21, 2021 | 07:05 PM
  #4  
702's Avatar
702
Seasoned HDF Member
Joined: May 2018
Posts: 5,814
Likes: 7,142
From: Las Vegas
Default

You might try tightening the valve cores a bit and see if that helps.
 
Reply
Old Sep 21, 2021 | 07:47 PM
  #5  
Red's Avatar
Red
Stellar HDF Member
Veteran: Army
20 Year Member
Joined: Oct 2005
Posts: 2,263
Likes: 935
From: Clearwater, Fl
Default

Aren't the temps dropping up there? Ten degree drop is probably good for a couple pound air loss. No psi issues with my '21 Limited
 
Reply
Old Sep 21, 2021 | 09:59 PM
  #6  
Dark lo's Avatar
Dark lo
Thread Starter
|
Road Captain
Joined: Oct 2012
Posts: 545
Likes: 3
From: Empire State
Default

Originally Posted by Red
Aren't the temps dropping up there? Ten degree drop is probably good for a couple pound air loss. No psi issues with my '21 Limited
yes but it’s happen when it was in the 80’s also
 
Reply
Old Sep 21, 2021 | 10:00 PM
  #7  
Dark lo's Avatar
Dark lo
Thread Starter
|
Road Captain
Joined: Oct 2012
Posts: 545
Likes: 3
From: Empire State
Default

Originally Posted by 702
You might try tightening the valve cores a bit and see if that helps.
will try it. Thank you
 
Reply
Old Sep 21, 2021 | 10:00 PM
  #8  
Dark lo's Avatar
Dark lo
Thread Starter
|
Road Captain
Joined: Oct 2012
Posts: 545
Likes: 3
From: Empire State
Default

Originally Posted by MURPHCC1
so I guess you're still under warranty.......bring it back and let them fix it.........
definitely will consider that if I can’t find a solution
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-1

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

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

 Verdad Gallardo
story-4

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-5

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-6

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-7

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-8

Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

 Verdad Gallardo
story-9

The Best and Worst Harley-Davidson Moves of 2025

 Verdad Gallardo
Old Sep 21, 2021 | 10:13 PM
  #9  
mjwebb's Avatar
mjwebb
Seasoned HDF Member
15 Year Member
Photogenic
Community Builder
Top Answer: 1
Joined: Jan 2008
Posts: 13,587
Likes: 11,281
From: State of Confusion
Default

the valve core tightening idea from 702 is a great idea..also, one thing to remember is don't rely on TPMS as an accurate 'gauge' (pun intended' for psi..it can be off a little from using a high quality tire pressure gauge
 
Reply
Old Sep 22, 2021 | 07:04 AM
  #10  
skratch's Avatar
skratch
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Jan 2007
Posts: 20,616
Likes: 4,440
From: anacoco, la
Default

how much pressure are we talking about? i find that my pressure will vary a lb or two after sitting for a while also.

at least you're checking your pressure regularly. that's more than some folks do.
 
Reply



All times are GMT -5. The time now is 06:29 AM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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
story-8
Southpaw Super Glide: A Left-Hand-Drive 1979 Harley FXE Built to Fit the Rider

Slideshow: Graeme Billington's left-hand-drive Shovelhead is as much about problem-solving as it is about classic Harley form.

By Verdad Gallardo | 2025-12-30 11:27:08


VIEW MORE
story-9
The Best and Worst Harley-Davidson Moves of 2025

Slideshow: A clear-eyed look at what actually worked for Harley this year, and what quietly undermined its progress.

By Verdad Gallardo | 2025-12-29 17:10:48


VIEW MORE