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Old 12-06-2012, 02:02 AM   #1 (permalink)
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Help Backfire issue

Hello! I wanted to see if anyone had any experience or advice that might help me. I have a 12 big blue pearl street glide that has had the baffles removed from both mufflers. However, I am noticing that when I let out the exhaust I am getting some backfire through the exhaust. Is this because the ECM needs to be reflashed? Or is it just the Harley way???

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Old 12-06-2012, 05:11 AM   #2 (permalink)
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I am not sure about all Harley engines but I was told that I needed to install baffles in my pipes and that backfire as well as other issues related to no baffles would go away. Sure enough.. Installed baffles and it rode like it should! I guess if Harley wanted these bikes to run without baffles they would have made them that way.
Having said all that, if it were mine i would put the baffles back in.


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Old 12-06-2012, 06:41 AM   #3 (permalink)
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You need something inside the pipes to produce some back pressure.
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Old 12-06-2012, 07:36 AM   #4 (permalink)
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Oh no - not back pressure again!
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Old 12-06-2012, 09:23 AM   #5 (permalink)
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Oh no - not back pressure again!

That's pretty funny. Made my morning
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Old 12-06-2012, 12:43 PM   #6 (permalink)
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Well I guess I could put stock pipes back on.... But they so quiet......
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Old 12-06-2012, 01:22 PM   #7 (permalink)
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Well I guess I could put stock pipes back on.... But they so quiet......
A few of questions:

What pipes do you have on it now?

Who removed the baffles?

Do you still have the baffles?

If you don't have the original baffles, depending on the pipes you currently have on your bike, you could purchase a pair of baffles for around $60-$70 and install them yourself.
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Old 12-06-2012, 03:57 PM   #8 (permalink)
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Yeah, you should just buy some shorter baffles for your pipes.


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Old 12-06-2012, 04:04 PM   #9 (permalink)
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You could buy new pipes.


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Old 12-06-2012, 04:26 PM   #10 (permalink)
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Yeah, you should just buy some shorter baffles for your pipes.


-Rohan
Or cut the ones you have. What pipes? What brand? No baffles slows exhaust velocity too much. Not only will it decel pop but the low/mid performance must suck too.
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