Back Firing Vs. Decel Pop
Thread Starter
|
Intermediate
Joined: Mar 2018
Posts: 43
Likes: 3
From: Bowmanville Ontario Canada
Back Firing Vs. Decel Pop
I have just installed a new Khrome Werks dragstyle exhaust (with baffles) on my bike, and a K&N high flow air filter. I have NOT installed a tuner but I am considering buy a power vision.
It was about -3degC today when I finished the install and fired the bike up. I didnt ride but I tested it in the garage. On decel at higher RPMs I seem to get a backfire every time. This included an orange flame shooting out of the pipe. I expected some decel pop but not back firing to that extend. Is this normal without a tune? Will a tune fix this, or do you suspect there is something else going on. Bike ran fine with the stock exhaust and air filter.
This is on a 2015 Wide Glide
Thanks,
It was about -3degC today when I finished the install and fired the bike up. I didnt ride but I tested it in the garage. On decel at higher RPMs I seem to get a backfire every time. This included an orange flame shooting out of the pipe. I expected some decel pop but not back firing to that extend. Is this normal without a tune? Will a tune fix this, or do you suspect there is something else going on. Bike ran fine with the stock exhaust and air filter.
This is on a 2015 Wide Glide
Thanks,
Grand HDF Member
Joined: Jul 2016
Posts: 4,384
Likes: 8,742
From: Texas
Yes - its running rich
A dyno tune will fix it..., any other tune..., including one from the moco - will band aid it
Please do it right
Ghost
A dyno tune will fix it..., any other tune..., including one from the moco - will band aid it
Please do it right
Ghost
Road Warrior
Joined: Jan 2006
Posts: 1,282
Likes: 115
From: British Columbia
I have just installed a new Khrome Werks dragstyle exhaust (with baffles) on my bike, and a K&N high flow air filter. I have NOT installed a tuner but I am considering buy a power vision.
It was about -3degC today when I finished the install and fired the bike up. I didnt ride but I tested it in the garage. On decel at higher RPMs I seem to get a backfire every time. This included an orange flame shooting out of the pipe. I expected some decel pop but not back firing to that extend. Is this normal without a tune? Will a tune fix this, or do you suspect there is something else going on. Bike ran fine with the stock exhaust and air filter.
This is on a 2015 Wide Glide
Thanks,
It was about -3degC today when I finished the install and fired the bike up. I didnt ride but I tested it in the garage. On decel at higher RPMs I seem to get a backfire every time. This included an orange flame shooting out of the pipe. I expected some decel pop but not back firing to that extend. Is this normal without a tune? Will a tune fix this, or do you suspect there is something else going on. Bike ran fine with the stock exhaust and air filter.
This is on a 2015 Wide Glide
Thanks,
Grand HDF Member
Joined: Jul 2016
Posts: 4,384
Likes: 8,742
From: Texas
Ghost
Considering? You need to go ahead and get the Powervision and get it tuned for the intake and exhaust.
Also those short pipes aren't helping the cause with popping and flames since they're shorter and much less restricted than the factory pipes, any unburnt fuel in the exhaust gases will ignite when it hits oxygen a the end of the pipe since it hasnt had enough time to cool via a long exhaust tract. I had Vance & Hines short ***** for a short period of time on my bike and even after being tuned, and occasionally during aggressive downshifts and engine braking or WOT runs and the fastest shifts I could make they would throw a flame other riders told me.
Also those short pipes aren't helping the cause with popping and flames since they're shorter and much less restricted than the factory pipes, any unburnt fuel in the exhaust gases will ignite when it hits oxygen a the end of the pipe since it hasnt had enough time to cool via a long exhaust tract. I had Vance & Hines short ***** for a short period of time on my bike and even after being tuned, and occasionally during aggressive downshifts and engine braking or WOT runs and the fastest shifts I could make they would throw a flame other riders told me.
Last edited by 2500hdon37s; Apr 15, 2018 at 08:44 PM.
Thread Starter
|
Intermediate
Joined: Mar 2018
Posts: 43
Likes: 3
From: Bowmanville Ontario Canada
Considering? You need to go ahead and get the Powervision and get it tuned for the intake and exhaust.
Also those short pipes aren't helping the cause with popping and flames since they're shorter and much less restricted than the factory pipes, any unburnt fuel in the exhaust gases will ignite when it hits oxygen a the end of the pipe since it hasnt had enough time to cool via a long exhaust tract. I had Vance & Hines short ***** for a short period of time on my bike and even after being tuned, and occasionally during aggressive downshifts and engine braking or WOT runs and the fastest shifts I could make they would throw a flame other riders told me.
Also those short pipes aren't helping the cause with popping and flames since they're shorter and much less restricted than the factory pipes, any unburnt fuel in the exhaust gases will ignite when it hits oxygen a the end of the pipe since it hasnt had enough time to cool via a long exhaust tract. I had Vance & Hines short ***** for a short period of time on my bike and even after being tuned, and occasionally during aggressive downshifts and engine braking or WOT runs and the fastest shifts I could make they would throw a flame other riders told me.
Trending Topics
Novice
Joined: Mar 2018
Posts: 19
Likes: 1
From: Clemson, SC
http://www.*****************/forums/...rich-lean.html
I did think. I still think it's too lean at idle.
edit: it's vtwinforum.com. I don't know why we can't post links to other forums. Regardless, popping on decel is almost always caused by a lean condition.
I did think. I still think it's too lean at idle.
edit: it's vtwinforum.com. I don't know why we can't post links to other forums. Regardless, popping on decel is almost always caused by a lean condition.
Last edited by dorri732; Apr 16, 2018 at 07:08 AM.
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
Thread Starter
|
Intermediate
Joined: Mar 2018
Posts: 43
Likes: 3
From: Bowmanville Ontario Canada
http://www.*****************/forums/...rich-lean.html
I did think. I still think it's too lean at idle.
edit: it's vtwinforum.com. I don't know why we can't post links to other forums. Regardless, popping on decel is almost always caused by a lean condition.
I did think. I still think it's too lean at idle.
edit: it's vtwinforum.com. I don't know why we can't post links to other forums. Regardless, popping on decel is almost always caused by a lean condition.
Tourer
Joined: Dec 2017
Posts: 391
Likes: 176
From: Leicestershire, United Kingdom
http://www.*****************/forums/...rich-lean.html
I did think. I still think it's too lean at idle.
edit: it's vtwinforum.com. I don't know why we can't post links to other forums. Regardless, popping on decel is almost always caused by a lean condition.
I did think. I still think it's too lean at idle.
edit: it's vtwinforum.com. I don't know why we can't post links to other forums. Regardless, popping on decel is almost always caused by a lean condition.
Both views have their own logic and perhaps one day I'll know enough to figure out which is correct. My own bike has quite of lot of popping on deceleration too.