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loud pop or 2 on start...normal? - 07 HSC

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Old Nov 9, 2006 | 12:24 PM
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Default loud pop or 2 on start...normal? - 07 HSC

'07 HSC, when starting I get a loud pop or two as she starts up. Basically sounds like someone hitting something solid with a wooden baseball bat. I assume (well, more hope really) that this is just a normal "backfire" out the exhaust, yes?
 
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Old Nov 9, 2006 | 12:40 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

I don't know if you've done anything to your pipes or air breather but I'd say your bike is running just a tad rich. I wouldn't sweat it though but you can pull your plugs and tell for sure.
 
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Old Nov 9, 2006 | 12:56 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

thanks for the reply.

No mods as of yet. Bone stock: 2007 HSC, EFI, 96ci motor
 
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Old Nov 9, 2006 | 01:07 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

Pull your plugs and see how it's burning then call HD and ask them what they think about it
JMHO
 
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Old Nov 9, 2006 | 01:20 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

ORIGINAL: T Tommyt

Pull your plugs and see how it's burning then call HD and ask them what they think about it
JMHO
That's what i would do
 
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Old Nov 10, 2006 | 05:36 AM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

my fb was doing that too, i found the two small black tubes in back of the air cleaner had cracked and came off. i replaced them and the spark plugs and she's smoother now. i would take off the air cleaner cover and inspect those two little back tubes, make sure they are still connected.
 
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Old Nov 10, 2006 | 05:45 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

Just back from the dealer. Service guy says it's normal for the '07s Of course it was warm when I started it for him so it did not make as load a noise. Guess, I've got two years of warranty to figure out if it is an issue.

Thanks for the replys

Happy F'n Friday everyone!!!!
 
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Old Nov 10, 2006 | 07:29 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

I get the same thing and so does every '07 I've heard. I read somewhere on this forum an explanation and why its normal.
 
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Old Nov 10, 2006 | 07:29 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

Dealer told me it's the compression release on the 07 models.

Jim
 
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Old Nov 10, 2006 | 08:15 PM
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Default RE: loud pop or 2 on start...normal? - 07 HSC

Yep. I get a fairly loud crack every time I start up my '07 Fat Boy.
 
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