Touring Models Road King, Road King Custom, Road King Classic, Road Glide, Street Glide, Electra Glide, Electra Glide Classic, and Electra Glide Ultra Classic bikes.
Sponsored by:
Sponsored by:

What is this?

Thread Tools
 
Search this Thread
 
Old May 7, 2020 | 05:27 PM
  #1  
WhiteyBulger's Avatar
WhiteyBulger
Thread Starter
|
Novice
Joined: Jul 2019
Posts: 17
Likes: 8
From: INDIANA
Default What is this?

So, 2002 Road King was starting to sputter out at idle when coasting, so I checked the internet and found that you should clean out your throttle body to start. Well, I took all the air cleaner parts off and noticed this on the throttle body and it looks like something is missing. I've only had the bike a year and this is my first Harley, so I'm kinda new to this. It just looks like some type of hose should be there because it looks like a piece is still on it. Any help would be greatly appreciated!
 
Reply
Old May 7, 2020 | 05:44 PM
  #2  
MyFavRk's Avatar
MyFavRk
Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Default

Hopefully someone will come along and know , but my guess is that it should be plugged with a rubber grommet , most of the time they get dried dried up and crack , blown off . Any auto shop or parts warehouse should carry them . While your at it , I would clean your IAC while the air cleaner is off . The little hole at 12 oclock can be sprayed with carb cleaner to get any crud and debris out of it , place a rage in their to catch it all . This procedure will help make your engine run smoother . Many videos out there on how to do it .

Hope you get it running well , enjoy !
 
Reply
Old May 7, 2020 | 05:51 PM
  #3  
QC's Avatar
QC
Seasoned HDF Member
10 Year Member
Liked
Loved
Top Answer: 1
Joined: Mar 2012
Posts: 100,455
Likes: 19,811
From: Centennial, CO
Default

I can't remember what that little tube is for either, but I do know it should be capped off. It creates a small vacuum leak and erratic idle. Cleaning the IAC as MyFavRk said will help immensely with stalling issues. Make sure you use "Throttle Body Cleaner" and not just carb cleaner.
 
Reply
Old May 7, 2020 | 05:55 PM
  #4  
GalvTexGuy's Avatar
GalvTexGuy
Seasoned HDF Member
Veteran: Navy
10 Year Member
Joined: Apr 2015
Posts: 10,057
Likes: 5,316
Default

Already answered, but here's a photo I found showing the rubber cap.





 
Reply
Old May 7, 2020 | 05:56 PM
  #5  
MyFavRk's Avatar
MyFavRk
Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Default

Originally Posted by QC
I can't remember what that little tube is for either, but I do know it should be capped off. It creates a small vacuum leak and erratic idle. Cleaning the IAC as MyFavRk said will help immensely with stalling issues. Make sure you use "Throttle Body Cleaner" and not just carb cleaner.



Thank you QC , I was wondering about that . I was doing a search as you posted , much appreciated !
 
Reply
Old May 7, 2020 | 06:00 PM
  #6  
QC's Avatar
QC
Seasoned HDF Member
10 Year Member
Liked
Loved
Top Answer: 1
Joined: Mar 2012
Posts: 100,455
Likes: 19,811
From: Centennial, CO
Default

I just did more research myself. It is a "purge hose fitting" for California models.
 
Reply
Old May 7, 2020 | 06:00 PM
  #7  
WhiteyBulger's Avatar
WhiteyBulger
Thread Starter
|
Novice
Joined: Jul 2019
Posts: 17
Likes: 8
From: INDIANA
Default

Thanks for the answers and tips, all! I tried googling a picture of the throttle body and just couldn't find one with a good angle. Thanks again!
 
Reply
Old May 7, 2020 | 06:28 PM
  #8  
MyFavRk's Avatar
MyFavRk
Seasoned HDF Member
Joined: Nov 2018
Posts: 10,833
Likes: 6,485
From: Canada Flats
Default

Keep us posted on the progress , always nice to hear how members are making out with their bikes .
 
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 May 8, 2020 | 01:34 AM
  #9  
Steve Sportster's Avatar
Steve Sportster
Outstanding HDF Member
Joined: Mar 2018
Posts: 2,773
Likes: 2,261
From: Ft. Wayne IN
Default

Glad you found some help. Curious about your choice of "WhiteyBulger" for a Forum name.

https://en.wikipedia.org/wiki/Whitey_Bulger
 
Reply
Old May 8, 2020 | 07:39 AM
  #10  
Cozz's Avatar
Cozz
Grand HDF Member
Photogenic
Top Answer: 3
Top Answer: 5
Top Answer: 10
Joined: Oct 2015
Posts: 4,802
Likes: 6,915
From: Cincinnati OH.
Default

Glad this thread popped up. I was cleaning my throttle body last week, because of a low/erratic idle and noticed that same open ended tube. Promptly forgot about it. Now I can stop at the hardware store, or dealer to get a cap for it. 👍

Maybe it will help my paint shaker idle.
 
Reply



All times are GMT -5. The time now is 06:45 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