backfire after installing slip ons - Road Glide Forums
Engine Related Engine Builds and more for Road Glides

LinkBack Thread Tools Display Modes
post #1 of 13 (permalink) Old 02-01-2018, 10:26 PM Thread Starter
Join Date: Jan 2018
Posts: 16
backfire after installing slip ons

I installed some TAB Performance slip ons with the zombie baffles. I also put the K&N on and I bought the tuner and tuned it to the settings it says to. The bike rides fine but I get a backfire once in a while and after every ride, I can smell fuel when I go back into my garage for a day or so. Is this common after installing these?
mnytoks is offline  
Sponsored Links
post #2 of 13 (permalink) Old 02-01-2018, 10:45 PM
Life Member
rlaf75's Avatar
Join Date: Sep 2011
Location: East Hartford CT
Posts: 7,181
Not familiar with those slipons and don't know what tuner you are using but it sounds like you need a better tune.

09 Mirage Orange Pearl

Some people just need a high-five. In the head. With a chair
rlaf75 is offline  
post #3 of 13 (permalink) Old 02-01-2018, 11:17 PM
Join Date: Jul 2015
Location: Siler City, NC
Posts: 285
Yeah somethings off there. Combustion should be in the combustion chamber! Tune not right for that combination or there happens to be a mechanical problem.

2016 Road Glide Ultra
dreeves is offline  
post #4 of 13 (permalink) Old 02-02-2018, 12:51 AM Thread Starter
Join Date: Jan 2018
Posts: 16
I figured something was wrong. I'll try to tune it again, maybe I missed something.
mnytoks is offline  
post #5 of 13 (permalink) Old 02-02-2018, 05:38 AM Thread Starter
Join Date: Jan 2018
Posts: 16
I'm using the Power Vision tuner. I plugged it in and followed the directions and it asked me what type of intake and exhaust I was using. It ran fine for the first few weeks but all of a sudden I get a random back fire and now I smell fuel, as if it's running rich.
mnytoks is offline  
post #6 of 13 (permalink) Old 02-02-2018, 07:31 AM
Grey beard
BlazingSaddle's Avatar
Join Date: Aug 2014
Location: Florida
Posts: 927
Are you talking BACKFIRE, or popping here and there on hard deceleration? Here’s what Brian at Fuel Moto told me when I called with same symptoms, stronger smell of fuel, and popping even after auto tuning their custom map for my application. Bike runs strong. He said “the smell is noticeable because the bike isn’t running lean anymore. You’re used to not smelling anything, and now that the bike is running richer, you’ll smell fuel”. So after that, I started looking, and to the man, bikes which have aftermarket tuners smell like they run rich compared to stock setups. Walk behind a bike that smells like it runs rich, and ask the owner if he’s got a tuner. Brian also told me the popping is there, just not as noticeable with stock set-up. There are ways to decrease it from happening, but you’re not going to eliminate it completely. It seems more noticeable when you change pipes because the aftermarket pipes aren’t as baffled. I guess it depends on how bad yours is popping, and just how rich it’s running. If you have actual backfiring, then like you said, you need to take another look. What tuner are you running?
BlazingSaddle is offline  
post #7 of 13 (permalink) Old 02-02-2018, 09:57 AM
Life Member
Thermodyne's Avatar
Join Date: Jan 2014
Location: South Central PA
Posts: 1,765
I don't work with that tuner, so I can't tell you what to do specifically.

But there are two strategies for stopping decel exhaust pop.

The easy one, the one that works for the broadest cross section of scooters, is to leave the mix rich at decel. Too rich to light off and pop. Down side is that you'll smell the unburned fuel, and it will give the occasional pop.

The hard way is to turn the fuel off on decel. But that means that you'll have to program some throttle roll on anticipation enrichment. Think accelerator pump in the carb. A shot of fuel as you roll the throttle back on. And that needs to be tailored to the scooter being worked on.

As with most things, the hard way is the best way.

With the tuner I work with, it a setting in the firmware, then adjusting the when, and the how much. The when is the RPM range where it is used. And the how much is just that, how much extra fuel is added.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Thermodyne is offline  
post #8 of 13 (permalink) Old 02-04-2018, 10:40 PM Thread Starter
Join Date: Jan 2018
Posts: 16
Thanks for the replies. I now realize that it's just popping on decal and it makes sense that a good tune will make it run rich. Does anyone else smell fuel in the garage after a ride on their bike?
mnytoks is offline  
post #9 of 13 (permalink) Old 02-04-2018, 11:11 PM
Grey beard
BlazingSaddle's Avatar
Join Date: Aug 2014
Location: Florida
Posts: 927
Yep. More so if I close the garage door immediately after a ride.
BlazingSaddle is offline  
post #10 of 13 (permalink) Old 02-04-2018, 11:45 PM
Slimboybinz's Avatar
Join Date: Oct 2015
Location: Cpe Town South Africa
Posts: 172
Decel pop

I also have the FP3 tuner,

There is a setting in the program that allows you to adjust the amount of deceleration pop from zero to plenty.

Maybe take a look at that?

Slimboybinz is offline  

Quick Reply

Register Now

In order to be able to post messages on the Road Glide Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
occasional backfire after installing new pipes deanseib Intake and Exhaust 7 07-24-2013 08:59 AM
Occasional Backfire Normal? ChivoChavez321 Troubleshooting for Road Glides 8 07-22-2013 07:49 AM
Feeling "disconnected" after installing new grips. Am I crazy? RGCBandit Controls & Handlebars 4 10-23-2012 12:24 AM
Now battery is dead a month after installing J&M amp DED HD Audio 4 06-30-2011 01:28 PM
Turn signals erratic after installing trailer pigtail Sincecrazy Lighting 5 09-07-2010 06:39 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome