Fullsac Backfire
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Cruiser
Joined: Sep 2011
Posts: 196
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From: South Carolina
Fullsac Backfire
I have installed the DX-Pipes, 96-103 Muffler Recore kit and programmed my Mastertune with a map from Fullsac on my 2013 Ultra. I’m getting a backfire, periodically, when I go from 1st to 2nd and 2nd to 3rd. Any ideas on what would be causing that?
Outstanding HDF Member
Joined: May 2008
Posts: 2,543
Likes: 19
From: Ashland Ohio
No canned tune, even from Steve, is right on the money. What rpm does this pop occur? And... are they one pop per gear shift? If so, use the Decel Enleanment tables could help with that one lone pop per shift.
Does it pop when you let off the throttle and allow the bike to coast against the engine?
Does it pop when you let off the throttle and allow the bike to coast against the engine?
Club Member
Joined: Aug 2007
Posts: 10,393
Likes: 2,060
From: N. Atlanta Burbs
I have the same problem with the same pipe. Have been working on it for over a year.
It's a shift pop. I'll bet the OP has the same shift pop that I do. It's a reversion issue. The larger the baffles in the mufflers the more it will shift pop. Mine are 2.25" Bet the OP has at least a 2.0". I know of others with the same pipe that has the same shift pop.
This shift pop doesn't depend on anything and will not happen at any other common aspect of the ride but the RPM's. 3000 to 3500 you pull in the clutch and Bang. May only happen once or twice a ride or not at all.
Totally weird.
It's a shift pop. I'll bet the OP has the same shift pop that I do. It's a reversion issue. The larger the baffles in the mufflers the more it will shift pop. Mine are 2.25" Bet the OP has at least a 2.0". I know of others with the same pipe that has the same shift pop.
This shift pop doesn't depend on anything and will not happen at any other common aspect of the ride but the RPM's. 3000 to 3500 you pull in the clutch and Bang. May only happen once or twice a ride or not at all.
Totally weird.
Thread Starter
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Cruiser
Joined: Sep 2011
Posts: 196
Likes: 0
From: South Carolina
No canned tune, even from Steve, is right on the money. What rpm does this pop occur? And... are they one pop per gear shift? If so, use the Decel Enleanment tables could help with that one lone pop per shift.
Does it pop when you let off the throttle and allow the bike to coast against the engine?
Does it pop when you let off the throttle and allow the bike to coast against the engine?
Last edited by StuxnetKiller; Oct 23, 2013 at 10:12 PM.
Thread Starter
|
Cruiser
Joined: Sep 2011
Posts: 196
Likes: 0
From: South Carolina
I have the same problem with the same pipe. Have been working on it for over a year.
It's a shift pop. I'll bet the OP has the same shift pop that I do. It's a reversion issue. The larger the baffles in the mufflers the more it will shift pop. Mine are 2.25" Bet the OP has at least a 2.0". I know of others with the same pipe that has the same shift pop.
This shift pop doesn't depend on anything and will not happen at any other common aspect of the ride but the RPM's. 3000 to 3500 you pull in the clutch and Bang. May only happen once or twice a ride or not at all.
Totally weird.
It's a shift pop. I'll bet the OP has the same shift pop that I do. It's a reversion issue. The larger the baffles in the mufflers the more it will shift pop. Mine are 2.25" Bet the OP has at least a 2.0". I know of others with the same pipe that has the same shift pop.
This shift pop doesn't depend on anything and will not happen at any other common aspect of the ride but the RPM's. 3000 to 3500 you pull in the clutch and Bang. May only happen once or twice a ride or not at all.
Totally weird.
Last edited by StuxnetKiller; Oct 23, 2013 at 10:15 PM.
Club Member
Joined: Aug 2007
Posts: 10,393
Likes: 2,060
From: N. Atlanta Burbs
I got frustrated so I called Doc about it a long time ago. No joy. It's not a sensor relocation issue fix.
He said it had to do with the Fullsac steps.
I've had DE reset all over the place. No joy
I've increased and decreased VE's. No joy
I've changed timing. No joy
No joy on intake or exhaust leaks either
It's the splinter in my side. Drives me nuts.
He said it had to do with the Fullsac steps.
I've had DE reset all over the place. No joy
I've increased and decreased VE's. No joy
I've changed timing. No joy
No joy on intake or exhaust leaks either
It's the splinter in my side. Drives me nuts.
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Joined: Oct 2007
Posts: 4,108
Likes: 1,964
From: New England
I have essentially the same issue with the FullSac on my 2012 using both stock and FullSac recores (I get more popping with the recores).
Went through many of the same TTS adjustments without luck.
For giggles, I plugged the left pipe and that seemed to work...or at least I couldn't duplicate the popping. I removed the plug and the pops returned.
I think I'll experiment next spring with different amounts of restriction.
Went through many of the same TTS adjustments without luck.
For giggles, I plugged the left pipe and that seemed to work...or at least I couldn't duplicate the popping. I removed the plug and the pops returned.
I think I'll experiment next spring with different amounts of restriction.
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Club Member
Joined: Aug 2007
Posts: 10,393
Likes: 2,060
From: N. Atlanta Burbs
I have essentially the same issue with the FullSac on my 2012 using both stock and FullSac recores (I get more popping with the recores).
Went through many of the same TTS adjustments without luck.
For giggles, I plugged the left pipe and that seemed to work...or at least I couldn't duplicate the popping. I removed the plug and the pops returned.
I think I'll experiment next spring with different amounts of restriction.
Went through many of the same TTS adjustments without luck.
For giggles, I plugged the left pipe and that seemed to work...or at least I couldn't duplicate the popping. I removed the plug and the pops returned.
I think I'll experiment next spring with different amounts of restriction.
The majority of the shift pop that I have comes from the left muffler. I've got no issue with zapping a freeze plug in the left extension.
Miss you in GA man... Hope you are doing well.
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Joined: Oct 2007
Posts: 4,108
Likes: 1,964
From: New England
Only 25 here this morning and only got to 41 this afternoon...it's suppose to be even cooler the next few days so I don't think I'll experiment until weather warms (can you say next spring???).
I'll keep you posted!
Take care my friend!!!
