Softail Models Standard, Custom, Night Train, Deuce, Springer, Heritage, Fatboy, Deluxe, Rocker and Cross Bones.
Sponsored by:
Sponsored by:

Gas cap rattle

Thread Tools
 
Search this Thread
 
Old Sep 15, 2018 | 06:36 PM
  #1  
P51Driver's Avatar
P51Driver
Thread Starter
|
Road Warrior
10 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2012
Posts: 1,307
Likes: 195
From: Ohio
Default Gas cap rattle

Today I was out on my 2018 Lowrider. I don't usually ride it hard but today was a bit of an exception. Today I noticed when upshifting at over 4000 rpm I was hearing a loud raspy noise when I got off the throttle to upshift. I first thought that I had a real issue and was very concerned that was until I realized that the noise was the gas cap rattling during shifting at rpms higher that 4000 rpm. Imagine my relief when I realized the noise was only the gas cap.
 
Reply
Old Sep 16, 2018 | 02:57 AM
  #2  
Bone Doc's Avatar
Bone Doc
Seasoned HDF Member
10 Year Member
Joined: Oct 2012
Posts: 13,112
Likes: 13,064
From: Texas, USA
Default

It's a known problem.

Gas cap rattle
 
Reply
Old Sep 16, 2018 | 03:04 AM
  #3  
Mark Faulkner's Avatar
Mark Faulkner
Road Captain
Joined: Apr 2018
Posts: 667
Likes: 189
From: U.K.
Default

My Breakout has the same problem. I'm thinking of changing it for a locking cap.
 
Reply
Old Sep 16, 2018 | 03:38 AM
  #4  
justcruising's Avatar
justcruising
Advanced
5 Year Member
Joined: Dec 2017
Posts: 96
Likes: 27
From: Brisbane, Australia
Default

My Deluxe has the same problem & had my local HD agent note it on file last week for rectification when/should a fix become available ��. Tis annoying and hard to believe they could get something so basic WRONG! Walked onto the show room floor and was NO different on the floor stock ��. Here’s hoping! ����
 
Reply
Old Sep 16, 2018 | 07:38 AM
  #5  
Hey Man's Avatar
Hey Man
Seasoned HDF Member
10 Year Member
Liked
Loved
Community Favorite
Joined: Jun 2015
Posts: 10,298
Likes: 7,779
From: West Central FL
Default

Look here.

https://www.hdforums.com/forum/softa...g-gas-cap.html
 
Reply
Old Sep 16, 2018 | 08:23 AM
  #6  
baz70's Avatar
baz70
Advanced
Joined: Jun 2018
Posts: 57
Likes: 24
From: MA
Default

common problem for sure, along with the condensation under the speedo glass. I have both issues. for the fuel cap, I flipped it over on some soft cloth, took a hammer and flathead screwdriver and punched the inner lip of the chrome looking piece down so it doesn't spin freely (and vibrate).. simplest way to fix it, and it works. I hate the look and feel of the cheap stock caps.
 
Reply
Old Sep 17, 2018 | 05:11 AM
  #7  
billbrummett's Avatar
billbrummett
Road Captain
10 Year Member
Joined: Jul 2011
Posts: 522
Likes: 204
From: dunedin, fl
Default

after 2 warranty replacements did the same thing, I used some channel locks to crimp the metal rim above the o-ring. now it is quiet. I find it almost unfathomable, given Harley's problems, that they haven't fixed this yrs old problem. sometimes I think they are blinded by a captive market that existed until a few yrs ago. same with the oil breather/air cleaner puking. no other manufacturer has the problem, and they all need to breathe from the crankcase. It makes you wonder..............
 
Reply
Old Sep 17, 2018 | 06:44 AM
  #8  
badcooky's Avatar
badcooky
Banned
Joined: Jan 2012
Posts: 3,098
Likes: 474
From: Location location.
Default

yea mine did it but I didn't know what it was so I shimmed up everything that could rattle gasket papered anything a little drummy and it still rattled , til I put my hand on the gas cap
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

 Verdad Gallardo
story-1

6 Weirdest Harley-Davidsons Ever Sold to the Public

 Verdad Gallardo
story-2

7 Times Harley-Davidson Chucked Tradition Out the Window

 Verdad Gallardo
story-3

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-4

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-5

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-6

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

 Verdad Gallardo
story-7

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

 Verdad Gallardo
story-8

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-9

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
jf7689
EVO
14
Oct 24, 2018 06:41 AM
walkerinin
General Harley Davidson Chat
29
Oct 28, 2015 02:08 PM
Krazy8s
Dyna Glide Models
5
Jul 10, 2012 06:38 AM
ripto
Sportster Models
11
Dec 31, 2008 05:23 PM
Gpsjr10
Sportster Models
8
Jul 11, 2007 02:00 PM




All times are GMT -5. The time now is 03:24 AM.

story-0
Harley-Davidson Fat Boy Becomes a Dark, Decepticon-Inspired Custom

Slideshow: Killer Custom's latest build relies on styling changes rather than performance upgrades, giving the cruiser an entirely different personality.

By Verdad Gallardo | 2026-06-03 18:28:05


VIEW MORE
story-1
6 Weirdest Harley-Davidsons Ever Sold to the Public

Slideshow: From military-inspired singles to scooters and three-wheel utility vehicles, these Harleys took the company far outside its comfort zone.

By Verdad Gallardo | 2026-06-02 18:34:10


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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