Pipe performance question

**voyager** · 03-11-2008, 10:13 PM

Hey all.

A question for those who have installed after market pipes. Did you notice that you had slight backfiring in the exhaust pipes with your free flowing exhaust than with your stock pipes? I realize why it's happening, just wondering if any modifications have to be done to eliminate it or what? I took my ride out for the first time to check out the exhaust and heard the very slight popping during deceleration. If left unchecked and the popping was severe, this can quickly blue your pipes where viewed. Do you worry about it and live with it , or do you address it early?

Thanks, voyager

blowndodge · 03-11-2008, 11:21 PM

Take off your right side air injector cover and look inside. there is a tube coming in from the outside with a 1/2 inch opening at about the 2 o'clock position ending behind the right side fast idle soleniod. Plug it with a marble and this will stop the air injection from entering the exhaust causing the backfiring your experiencing.

radco · 03-12-2008, 05:25 AM

1st BEAUTIFULL color on the Bike..

,, Like BD said go the marbel route,,I ve read alot about that here and on Gadgets page, and that is the major fix,,,,,,,,,,,,, ALSO check your exhaust Flange bolts,,They Loosen and will also cause a back fire.. WERE NEW CRUSH GASKETS installed w/exhaust?WERE the NEW CRUSH gaskets crushed evenly? were they Torqued to the right specs?were they crushed in 3 stages? was the torque checked after the engine got hot and colled down the first time? Please post on your results..as many will change their pipes this spring!

Rich

rlfaubion · 03-12-2008, 08:57 PM

My Classic (1600) with Vance & Hines, a Kury air kit, and PCIII, I had a ton of popping. Tried the marble, but I don't really know if I put it in the right tube as the pop continued. I had it Dyno-tuned, and no pop for over a year. I'd say do this for maximum performance.

tomk · 03-12-2008, 08:58 PM

Don't forget the coasters. I put them on mine and there is no backfire, just a clean looking motor.

03-11-2008, 10:13 PM	#1
voyager Join Date: Sep 2007 Location: Stony Plain, Alberta Posts: 694	Pipe performance question Hey all. A question for those who have installed after market pipes. Did you notice that you had slight backfiring in the exhaust pipes with your free flowing exhaust than with your stock pipes? I realize why it's happening, just wondering if any modifications have to be done to eliminate it or what? I took my ride out for the first time to check out the exhaust and heard the very slight popping during deceleration. If left unchecked and the popping was severe, this can quickly blue your pipes where viewed. Do you worry about it and live with it , or do you address it early? Thanks, voyager __________________ Travel is fatal to prejudice, bigotry, and narrow-mindedness, and many of our people need it sorely on these accounts.........Mark Twain. Login or Register to Remove Ads
	0

03-11-2008, 11:21 PM	#2
blowndodge Sr. Contributor Join Date: Jul 2007 Location: Washington City, Utah Posts: 16,474	Pipe performance question Take off your right side air injector cover and look inside. there is a tube coming in from the outside with a 1/2 inch opening at about the 2 o'clock position ending behind the right side fast idle soleniod. Plug it with a marble and this will stop the air injection from entering the exhaust causing the backfiring your experiencing. __________________ I love my Victory Cross Country Tour 106. Smells like Victory! Ultra's are Limited There are two types of Harley riders. Those that trailer them and those that push them. The most Interesting Man in the World "Find the things in life you don't do well and don't do those things" Member # 0005
	0

03-12-2008, 05:25 AM	#3
radco Sr. Member Join Date: Oct 2007 Location: Dedham Maine Posts: 4,199	Pipe performance question 1st BEAUTIFULL color on the Bike.. ,, Like BD said go the marbel route,,I ve read alot about that here and on Gadgets page, and that is the major fix,,,,,,,,,,,,, ALSO check your exhaust Flange bolts,,They Loosen and will also cause a back fire.. WERE NEW CRUSH GASKETS installed w/exhaust?WERE the NEW CRUSH gaskets crushed evenly? were they Torqued to the right specs?were they crushed in 3 stages? was the torque checked after the engine got hot and colled down the first time? Please post on your results..as many will change their pipes this spring! Rich __________________
	0

03-12-2008, 08:57 PM	#4
rlfaubion Sr. Member Join Date: Sep 2007 Location: Northern California Posts: 1,582	Pipe performance question My Classic (1600) with Vance & Hines, a Kury air kit, and PCIII, I had a ton of popping. Tried the marble, but I don't really know if I put it in the right tube as the pop continued. I had it Dyno-tuned, and no pop for over a year. I'd say do this for maximum performance.
	0

03-12-2008, 08:58 PM	#5
tomk Member Join Date: Oct 2010 Location: Southern California Posts: 65	Pipe performance question Don't forget the coasters. I put them on mine and there is no backfire, just a clean looking motor. Login or Register to Remove Ads
	0

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