Dyna Glide Models Super Glide, Super Glide Sport, Super Glide Custom, Dyna Glide Convertible, Super Glide T-Sport, Dyna Glide Police, Dyna Switchback, Low Rider, Street Bob, Fat Bob and Wide Glide.
Sponsored by:
Sponsored by:

Decel popping

Thread Tools
 
Search this Thread
 
Old Sep 9, 2019 | 10:11 AM
  #1  
rikkitony's Avatar
rikkitony
Thread Starter
|
Intermediate
Joined: Jul 2019
Posts: 32
Likes: 11
From: Pittsburgh Pa
Default Decel popping

I sprayed my exhaust with soapy water where the exhaust bolts to the motor and i'm getting bubbles, would a small exhaust leak cause bad decel popping? I'm not a mechanic by no means but would rather take a shot at saving some money by trying myself,
 
Reply
Old Sep 9, 2019 | 10:15 AM
  #2  
Jay Guild's Avatar
Jay Guild
Grand HDF Member
10 Year Member
Community Builder
Community Favorite
Joined: Jun 2013
Posts: 4,998
Likes: 864
From: Iowa
Default

It could be. Decel popping is usually too much air in the exhaust causing it to get hot and ignite the extra unused gas on decel. If you aren't getting good flow through the exhaust it could be getting too hot.
 
Reply
Old Sep 9, 2019 | 11:49 AM
  #3  
nevil's Avatar
nevil
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2008
Posts: 9,278
Likes: 1,138
From: southeast PA
Default

Could that bubbing be from spraying water on a hot motor?
Also check for intake leaks.
Not a whole lot more to offer since you told us absolutely nothing about your bike, mods, recent work, etc.
 

Last edited by nevil; Sep 9, 2019 at 11:51 AM.
Reply
Old Sep 9, 2019 | 12:48 PM
  #4  
rikkitony's Avatar
rikkitony
Thread Starter
|
Intermediate
Joined: Jul 2019
Posts: 32
Likes: 11
From: Pittsburgh Pa
Default

Originally Posted by nevil
Could that bubbing be from spraying water on a hot motor?
Also check for intake leaks.
Not a whole lot more to offer since you told us absolutely nothing about your bike, mods, recent work, etc.
I waited a couple hours and let the bike cool before I sprayed it, it's a 2012 street bob with 7500 miles, the only mods were done before purchase (5500 miles)which is Vance and Hines exhaust and screaming eagle heavy breather intake, I should have mentioned this in the post but I was in a rush, sorry bout dat.
 
Reply
Old Sep 9, 2019 | 01:43 PM
  #5  
Jay Guild's Avatar
Jay Guild
Grand HDF Member
10 Year Member
Community Builder
Community Favorite
Joined: Jun 2013
Posts: 4,998
Likes: 864
From: Iowa
Default

You probably just need to have the bike tuned so that more fuel is going to the combustion chamber to make up for the higher flow of air.
 
Reply
Old Sep 9, 2019 | 01:52 PM
  #6  
nevil's Avatar
nevil
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2008
Posts: 9,278
Likes: 1,138
From: southeast PA
Default

You can't check an exhaust leak with the motor not running. (Same with the intake.)
With the motor warmed up the seals will expand and seal better than when cold. Use a source of smoke, like a cigar or stick of incense and get it around the area of the exhaust flange. If there's a leak the smoke will show it.
For the intake, the motor is warmed and idling. Get a can of throttle body or mass airflow cleaner and spray around the intake port on each head. A leak will cause the idle to change noticeably. Be careful not to get any into the air intake, you'll get a false positive.
If there are no leaks, the tune would be the most likely culprit.
 
Reply
Old Sep 12, 2019 | 05:53 AM
  #7  
rikkitony's Avatar
rikkitony
Thread Starter
|
Intermediate
Joined: Jul 2019
Posts: 32
Likes: 11
From: Pittsburgh Pa
Default

Originally Posted by nevil
You can't check an exhaust leak with the motor not running. (Same with the intake.)
With the motor warmed up the seals will expand and seal better than when cold. Use a source of smoke, like a cigar or stick of incense and get it around the area of the exhaust flange. If there's a leak the smoke will show it.
For the intake, the motor is warmed and idling. Get a can of throttle body or mass airflow cleaner and spray around the intake port on each head. A leak will cause the idle to change noticeably. Be careful not to get any into the air intake, you'll get a false positive.
If there are no leaks, the tune would be the most likely culprit.
Just curious on how to find a leak with smoke when the motor is NOT running, to check an intake leak you would obviously have to have the motor running to listen for idle change, is that not correct?
 
Reply
Old Sep 12, 2019 | 08:00 AM
  #8  
John CC's Avatar
John CC
HDF Community Team
5 Year Member
Photoriffic
Loved
Community Favorite
Joined: Aug 2018
Posts: 3,002
Likes: 1,181
From: New Hampsha
Community Team
Default

For exhaust leaks let the engine idle, put a rag on your hand(s) and block the exhaust outlet(s). Any leaks will make a hissing sound.
 
Reply
Old Sep 12, 2019 | 08:14 AM
  #9  
nevil's Avatar
nevil
Seasoned HDF Member
15 Year Member
Liked
Loved
Community Favorite
Joined: Jul 2008
Posts: 9,278
Likes: 1,138
From: southeast PA
Default

Originally Posted by rikkitony
Just curious on how to find a leak with smoke when the motor is NOT running, to check an intake leak you would obviously have to have the motor running to listen for idle change, is that not correct?
I don't know of a way to check for exhaust leaks cold. Even if you could it might give a false positive. The metal needs to heat up and expand into the seals.
 
Reply
Old Sep 12, 2019 | 08:31 AM
  #10  
Jackie Paper's Avatar
Jackie Paper
Seasoned HDF Member
Community Builder
Community Influencer
Liked
Top Answer: 1
Joined: Mar 2010
Posts: 38,241
Likes: 6,302
From: Honah Lee
Default

Is bike stock? What exhaust system is on bike? What tuner? To check leaks, just take a small (1"X2") slip of newspaper held by needle nose pliers and put it close to joints. People are alway referring to exhaust leaks causing this but I really doubt it if you have a crossover still in system.
 
Reply



All times are GMT -5. The time now is 08:17 AM.