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What causes exhaust popping?

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Old 03-18-2012, 08:26 AM
Timax52 Timax52 is offline
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Default What causes exhaust popping?

I have just changed my old slip ons for new ones and am getting a bit of popping...what causes this and how do i fix it?

2000 RKC EFI

Many Thanks in advance
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Old 03-18-2012, 08:38 AM
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Put the words decel pop into the search feature above and you'll read about bike tuning, EFI remapping, lean conditions, etc.

I have some decel popping (mostly just gurgling) and actually love it.
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Old 03-18-2012, 08:43 AM
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Guessing you might have a leak @ pipe/header joint...did you use HT silicone on new pipes (i.e. liquid copper), new clamps & torque to speck?
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Old 03-18-2012, 08:46 AM
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Sounds like exhaust leak should be the first place to check.
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Old 03-18-2012, 08:54 AM
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Quote:
Originally Posted by TORQUEY View Post
Put the words decel pop into the search feature above and you'll read about bike tuning, EFI remapping, lean conditions, etc.

I have some decel popping (mostly just gurgling) and actually love it.
Yeah, what Torquey said. With the slips you have to make other choices which you will learn from taking Torquey's advice but that isn't the whole reason for the decel. Question is whether your new slip-ons have baffles in them. No baffles, then that is your reason for decel right there. You want to stop it but don't want to quiet the bike get Big City Thunder baffles. If there are baffles in your new slip-ons then Iceman is probably right.
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Old 03-18-2012, 09:05 AM
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if its popping when you decelerate (decel popping) its caused by fuel burning in the exhaust manifold or header. if thats the case a proper tune will also cure the problem

Last edited by ynots; 03-18-2012 at 09:07 AM.
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Old 03-18-2012, 05:28 PM
Timax52 Timax52 is offline
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Thanks guys, I did some research and found that decel popping is quite common and not harmful. I did use some copper grease and new clamps when fitting the slip ons and the bike now sounds like the devil with a toothache....I can live with the popping
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Old 03-18-2012, 06:55 PM
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Quote:
Originally Posted by Timax52 View Post
Thanks guys, I did some research and found that decel popping is quite common and not harmful. I did use some copper grease and new clamps when fitting the slip ons and the bike now sounds like the devil with a toothache....I can live with the popping
A properly tuned engine should not pop on decel. If the tune is right there will be no rich or lean conditions that will generate decel popping. That means that the popping is the result of intake or exhaust leaks. If those are sealed and the engine has a good tune, no popping. Some claim to like the popping but I am thinking they like it because they don't know how to get rid of it but would if they could. Decel popping is annoying; I hate it almost as much as I hate valve train noise but that's JMHO.
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