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

deceleration pops with installed xieds

Thread Tools
 
Search this Thread
 
Old Jul 15, 2008 | 06:49 PM
  #1  
autobahn's Avatar
autobahn
Thread Starter
|
Intermediate
Joined: May 2008
Posts: 49
Likes: 0
From: southern md.
Default deceleration pops with installed xieds

First of all, Im very happy with the xieds, dropped the temps. to 230 from all day driving and idling at lights at any given weather from upper 70s to mid 90s. I installed the Vance and Hines duals with quiet baffles, their brand intake kit and fuel pak prior to xieds, did not recalibrate any setting of fuel pak prior to xieds installations. My question is the first 2 days was fine with xieds maybe a pop or two every 10 minutes or so, but after 300 miles on it I get a deceleration pops everytime coming from 3rd on down, very frequent the first 15 minutes riding getting oil to optimum temps. Seems to run OK, will different or bad fuel cause it? should I recheck fuel pak settings? has anybody experienced pops after installation. Everything was installed pretty much the same time. Thanks for any input
 
Reply
Old Jul 15, 2008 | 07:22 PM
  #2  
2008 NIGHT TRAIN's Avatar
2008 NIGHT TRAIN
Intermediate
Joined: Feb 2008
Posts: 42
Likes: 0
Default RE: deceleration pops with installed xieds

XIED's took care of all my decel popping.

[IMG]local://upfiles/52212/A64B01C9D9C74B4FAD502529C451F66E.jpg[/IMG]
 
Reply
Old Jul 16, 2008 | 03:10 AM
  #3  
deadeye's Avatar
deadeye
Road Warrior
Joined: Feb 2007
Posts: 1,338
Likes: 92
From:
Default RE: deceleration pops with installed xieds

I have the XIED and no decel popping with stock pipes. I'll be installing a Supertrapp 2 into 1 soon. I have noticed backfires during starting a couple of times. I guessed it was caused by a little more unburned fuel in the exhaust gasses. A small price to pay for lower exhaust temps.
 
Reply
Old Jul 16, 2008 | 05:18 AM
  #4  
autobahn's Avatar
autobahn
Thread Starter
|
Intermediate
Joined: May 2008
Posts: 49
Likes: 0
From: southern md.
Default RE: deceleration pops with installed xieds

Ill check all connections again and make sure fuel pak is reading the same but you are right small price for running cooler, just wondering decelaration pops actually hurt anything. I might also take off the xieds and ride around just to see if its the cause or I have a defective pair. Ill post up my findings.
 
Reply
Old Jul 16, 2008 | 07:53 AM
  #5  
Hangfire1's Avatar
Hangfire1
Tourer
Joined: May 2008
Posts: 272
Likes: 1
From: Orygun
Default RE: deceleration pops with installed xieds

My understanding is it does not hurt anything, fuel is running a little rich.
 
Reply
Old Jul 16, 2008 | 07:56 AM
  #6  
Mr. Lucky's Avatar
Mr. Lucky
Stellar HDF Member
15 Year Member
Joined: Mar 2008
Posts: 2,134
Likes: 5
From: Delaware
Default RE: deceleration pops with installed xieds

ORIGINAL: autobahn

My question is the first 2 days was fine with xieds maybe a pop or two every 10 minutes or so, but after 300 miles on it I get a deceleration pops everytime coming from 3rd on down, very frequent the first 15 minutes riding getting oil to optimum temps.
This suggests to me that you have an exhaust leak. Metal expands as it heats, so if you have a marginal connection anywhere in the exhaust (maybe at the sensor bung?), it will likely get worse or better as things warm up.
 
Reply
Old Jul 16, 2008 | 08:00 AM
  #7  
stmpulr's Avatar
stmpulr
Cruiser
Joined: Jun 2008
Posts: 139
Likes: 0
From: USA
Default RE: deceleration pops with installed xieds

&nbsp\\;From what I have read decel popping is from small amounts of air getting into the exhaust when off the throttle usually from small leaks in the exhaust system (flange gaskets, joints).
 
Reply
Old Jul 16, 2008 | 08:12 AM
  #8  
rockerhead's Avatar
rockerhead
Road Captain
Joined: Aug 2007
Posts: 609
Likes: 0
From: Sunny Sedona AZ
Default RE: deceleration pops with installed xieds

also check your intake manifold for leaks at cylider heads .&nbsp\\; In the way back there was a tech buliten on this, it seems HD had a run of bad gaskets maybe they found some old ones and have mistakenly put them back on current units!
 
Reply
HD Forum Stories

The Best of Harley-Davidson for Lifelong Riders

story-0

7 Surprising Harley-Davidson Products that Are Not Motorcycles

 Verdad Gallardo
story-1

8 Best Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-2

10 Worst Harley-Davidson Motorcycles Ever

 Pouria Savadkouei
story-3

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

 Verdad Gallardo
story-4

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

 Verdad Gallardo
story-5

Harley-Davidson Reveals Super Cool Cafe Racer Concept

 Verdad Gallardo
story-6

Engraved Rebellion: Inside Bundnerbike's Glam Rock II

 Verdad Gallardo
story-7

10 Motorcycles You Should Never Buy

 Joe Kucinski
story-8

10 Things Harley-Davidson Needs to Fix in 2026

 Verdad Gallardo
story-9

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

 Verdad Gallardo
Old Jul 16, 2008 | 09:21 AM
  #9  
SAS's Avatar
SAS
Tourer
Joined: Mar 2008
Posts: 323
Likes: 0
From: Philadelphia, PA
Default RE: deceleration pops with installed xieds

Start your bike. Take a propane tourch...DO NOT LIGHT THE TOURCH... Pass the porpane over the connections and O2 sensors. If the tone changes that is where your leak is.
 
Reply
Old Jul 16, 2008 | 11:37 AM
  #10  
autobahn's Avatar
autobahn
Thread Starter
|
Intermediate
Joined: May 2008
Posts: 49
Likes: 0
From: southern md.
Default RE: deceleration pops with installed xieds

thanks for the inputs fellas, Ill check connections, only 6ft lbs on header bolts from what I read and I made sure I bought new gaskets when I did the install.
 
Reply



All times are GMT -5. The time now is 11:02 PM.

story-0
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-1
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-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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