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  #1  
Old 11-29-2012, 04:53 PM
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RCKYMTNRDR RCKYMTNRDR is offline
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Default SE 103 HO KIT Throttle Body Noise

So here is my issue: Brand Spanking new 2013 RGC. Before I took from the dealer I had them instal:

SE Stage IV 103 HO KIT
SE heavy breather
V&H 2 into 1 PRO PIPE Stainless

Ive put 1,000 mile on and it pulls HARD!

However when I have it at idle it makes a slapping sound that I have never heard on any of my other Harley's . Took it back to the Dealer so they could troubleshoot the problem. They came to the conclusion that it was the 58mm throttle bodies butterfly valve banging against the throttle body casing. They ordered a new throttle body and replaced it. Picked up yesterday and it is still making the noise!

Has anyone experienced this issue before?



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  #2  
Old 11-29-2012, 05:32 PM
Deweys Deweys is offline
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Common
It is reversion in the manifold and the manifold, that combination.
Similar sound to a mikuni slide rattle but less.
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Old 11-29-2012, 07:04 PM
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RCKYMTNRDR RCKYMTNRDR is offline
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Deweys thanks ..... but still not quite clear on what you mean by manifold and manifold combination?


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Old 11-29-2012, 07:11 PM
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Oh sorry man I think I got what your saying, OK if I understand correctly it is the reversion of air? Is that just the way it is.. Or do you recommend a solution?


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Old 11-29-2012, 10:13 PM
Deweys Deweys is offline
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All of them pulse in the manifold, with more overlap it gets worse. The TBW throttle body is servo motor controlled and I have heard them do this even on stockers after the Air Cleaner is substituted for an open element type (so this type of thing can be heard unmuffled). I think the Cable TB has more pressure to hold the blade shut so it does not flutter like that, at least that is what I suspect may be the issue, I honestly don't know this 100% for sure.
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Old 11-30-2012, 02:42 AM
Mike Jesse Mike Jesse is offline
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It's the FBW stepper motor.
They all do that.
My HPI TB is real noisy, you just get used to it.
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Old 11-30-2012, 03:27 AM
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If it sounds like two pieces of wood knocking together then more then likely it is reversion.
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Old 11-30-2012, 05:43 AM
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Not trying to scare you I hope that's what your noise is. ( Not piston slap.)

A simple way to tell is to cover up intake /air cleaner sound should almost go away.

Does it get worse when you are riding?
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Old 12-01-2012, 06:47 PM
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No it goes away once I slightly crack the throttle.


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Old 12-01-2012, 07:03 PM
tdkkart tdkkart is offline
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As the others said it's most likely reversion, caused by camshafts that actually have overlap(intake and exhaust open at the same time). Scares the crap out alot of folks when they hear it after having an open air filter the first time.

Put the stock air cleaner on it long enough to check, I'll bet the noise goes away.
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