Decel pop, losing my mind....
Thread Starter
|
Tourer
Joined: Nov 2013
Posts: 433
Likes: 18
From: Cheyenne, WY
Decel pop, losing my mind....
I'm at my wit's end here with my 03 Super Glide. I've got serious decel pop, I mean like machine gun fire especially rolling downhill. I've tweaked the carb mixture and it doesn't matter if it's rich or lean, I've even tested it going from 6,000 ft to 3,000 ft to 9,000 ft in elevation...no change. I've checked for leaks in the exhaust and intake and I can't seem to find any. I've look all over the web and most people have a solution, but for a fuel injected bike, not for a carbureted one. I get that some decel pop is normal on a properly tuned bike, but this is just ridiculous...
Any suggestions would be greatly appreciated.
Any suggestions would be greatly appreciated.
Extreme HDF Member
Joined: Feb 2015
Posts: 10,907
Likes: 8,758
From: Galt's Gulch - MI
I'm at my wit's end here with my 03 Super Glide. I've got serious decel pop, I mean like machine gun fire especially rolling downhill. I've tweaked the carb mixture and it doesn't matter if it's rich or lean, I've even tested it going from 6,000 ft to 3,000 ft to 9,000 ft in elevation...no change. I've checked for leaks in the exhaust and intake and I can't seem to find any. I've look all over the web and most people have a solution, but for a fuel injected bike, not for a carbureted one. I get that some decel pop is normal on a properly tuned bike, but this is just ridiculous...
Any suggestions would be greatly appreciated.
Any suggestions would be greatly appreciated.
Decel popping and burbling is created by fresh air mixing with unburnt fuel from the engine under off-throttle situations; when the air/fuel ratio is right it burns off in the hot pipes.
With no exhaust leaks I'd start by looking at your throttle adjustments. Riding style, as in not completely closing the throttle, or having your throttle cables too tight can give you excessive decel popping even with a properly setup carb.
Another option would be to use TTI's in the pipes to help prevent the reversion of fresh air in to the exhaust off-throttle. I've used TTI's on my carbed bikes with success and never experienced decel popping or burbling.
I'd start with your throttle cable adjustments and confirm the throttle is indeed completely closing. I'd also look at the enrichener cable to be certain it is fully closing...
Grand HDF Member
Joined: Mar 2013
Posts: 4,922
Likes: 589
From: Running with the gators
I moved from Denver. When I was living there I bought my 13 from your dealer, but from their Frederick location.
Anyway, I put my current V&H Straight shots on, Arlen Ness big sucker II. It would pop and fart, snap, sh#t and what ever else the liberal altitude would throw at it at decel.
Finally added the Vance and Hines Fuel Pak 3 and wa-la! NO MORE DECEL POP
Simple. Pay to play. Get results. Im happy now.
Anyway, I put my current V&H Straight shots on, Arlen Ness big sucker II. It would pop and fart, snap, sh#t and what ever else the liberal altitude would throw at it at decel.
Finally added the Vance and Hines Fuel Pak 3 and wa-la! NO MORE DECEL POP
Simple. Pay to play. Get results. Im happy now.
Road Master
Joined: Jun 2011
Posts: 854
Likes: 45
From: Ohio
I moved from Denver. When I was living there I bought my 13 from your dealer, but from their Frederick location.
Anyway, I put my current V&H Straight shots on, Arlen Ness big sucker II. It would pop and fart, snap, sh#t and what ever else the liberal altitude would throw at it at decel.
Finally added the Vance and Hines Fuel Pak 3 and wa-la! NO MORE DECEL POP
Simple. Pay to play. Get results. Im happy now.
Anyway, I put my current V&H Straight shots on, Arlen Ness big sucker II. It would pop and fart, snap, sh#t and what ever else the liberal altitude would throw at it at decel.
Finally added the Vance and Hines Fuel Pak 3 and wa-la! NO MORE DECEL POP
Simple. Pay to play. Get results. Im happy now.
Thread Starter
|
Tourer
Joined: Nov 2013
Posts: 433
Likes: 18
From: Cheyenne, WY
I moved from Denver. When I was living there I bought my 13 from your dealer, but from their Frederick location.
Anyway, I put my current V&H Straight shots on, Arlen Ness big sucker II. It would pop and fart, snap, sh#t and what ever else the liberal altitude would throw at it at decel.
Finally added the Vance and Hines Fuel Pak 3 and wa-la! NO MORE DECEL POP
Simple. Pay to play. Get results. Im happy now.
Anyway, I put my current V&H Straight shots on, Arlen Ness big sucker II. It would pop and fart, snap, sh#t and what ever else the liberal altitude would throw at it at decel.
Finally added the Vance and Hines Fuel Pak 3 and wa-la! NO MORE DECEL POP
Simple. Pay to play. Get results. Im happy now.
Thread Starter
|
Tourer
Joined: Nov 2013
Posts: 433
Likes: 18
From: Cheyenne, WY
Decel popping and burbling is created by fresh air mixing with unburnt fuel from the engine under off-throttle situations; when the air/fuel ratio is right it burns off in the hot pipes.
With no exhaust leaks I'd start by looking at your throttle adjustments. Riding style, as in not completely closing the throttle, or having your throttle cables too tight can give you excessive decel popping even with a properly setup carb.
Another option would be to use TTI's in the pipes to help prevent the reversion of fresh air in to the exhaust off-throttle. I've used TTI's on my carbed bikes with success and never experienced decel popping or burbling.
I'd start with your throttle cable adjustments and confirm the throttle is indeed completely closing. I'd also look at the enrichener cable to be certain it is fully closing...
With no exhaust leaks I'd start by looking at your throttle adjustments. Riding style, as in not completely closing the throttle, or having your throttle cables too tight can give you excessive decel popping even with a properly setup carb.
Another option would be to use TTI's in the pipes to help prevent the reversion of fresh air in to the exhaust off-throttle. I've used TTI's on my carbed bikes with success and never experienced decel popping or burbling.
I'd start with your throttle cable adjustments and confirm the throttle is indeed completely closing. I'd also look at the enrichener cable to be certain it is fully closing...
Trending Topics
Seasoned HDF Member
Joined: Mar 2012
Posts: 100,455
Likes: 19,811
From: Centennial, CO
Yup, are you running baffles?
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Tourer
Joined: Feb 2016
Posts: 309
Likes: 39
From: Southlake Texas
On a carbed bike exhaust popping is either ignition or exhaust leaks, period!
If you have no issues with missing in cruise or acceleration, then it is the exhaust causing the popping. My guess is one of 3 things:
1) You have removed the baffles so air is being sucked into the empty cans and acting like a leak. Or
2) There is a crack in one or both exhaust pipes. Or
3) You're running pipes with a tap for an o2 sensor that is letting air in. Or not using the correct gasket if the single pipes have a crossover.
These guesses are assuming you replaced the exhaust gaskets already and made sure the pipes are seated fully into the correct gaskets.
If you have no issues with missing in cruise or acceleration, then it is the exhaust causing the popping. My guess is one of 3 things:
1) You have removed the baffles so air is being sucked into the empty cans and acting like a leak. Or
2) There is a crack in one or both exhaust pipes. Or
3) You're running pipes with a tap for an o2 sensor that is letting air in. Or not using the correct gasket if the single pipes have a crossover.
These guesses are assuming you replaced the exhaust gaskets already and made sure the pipes are seated fully into the correct gaskets.
Last edited by CJD197; Aug 22, 2017 at 04:32 PM.