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Buell Motorcycle Forum » THUMPer Forum » Blasting Away - The Thumper Quick board » Archive through May 15, 2008 » Whirring/flapping sound during mid to hi revs « Previous Next »

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Ozzyflash
Posted on Thursday, November 15, 2007 - 08:38 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

My 05' blast has recently developed a whirring sound during mid to hi engine revs both at speed and while stopped. I originally thought it was gearbox related, but discovered today that I could duplicate the sound while stopped and in neutral. The sound is like that of a plastic bag in a strong wind... fairly loud as I can hear it clearly with my helmet on. Any pointers on where to look would be appreciated. Also, I have a stock air box/cleaner that I've checked for faults. None found.
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Buellistic
Posted on Thursday, November 15, 2007 - 10:22 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Maybe the CHAIN GUIDE PN 39394-00Y(2000 Parts Book) has broken and fallen into the Primary Chain ???
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Swampy
Posted on Friday, November 16, 2007 - 07:31 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Welcome to the Badweb Ozzyflash!

I would believe the noise is coming from your primary.

Try adjusting your primary chain.

If that doesn't work you should remove you primary cover and look for problems there.
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Ezblast
Posted on Friday, November 16, 2007 - 10:40 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Concur!
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Ozzyflash
Posted on Friday, November 16, 2007 - 06:47 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Alright, I'm compiling a list of the necessary items that will need replacement merely by the removal of the primary cover. Please add if there are any additional items I haven't considered.

Primary Cover Gasket, Clutch Inspection Cover Gasket, oil seal for the shift lever, and replacement fluids.

I'm thinking it will be less of a mess if I drop the Exhaust... so add in an Exhaust Manifold Gasket.

Any further hardware items?
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Swampy
Posted on Friday, November 16, 2007 - 10:30 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If you take the primary cover off, and you have the tools available to remove the clutch and crank drive sprocket, champher the edges on the small plate that retains the stator wires, then put a generous helping of silicone sealer under the plate to keep the wires from moving. Also adjust your shifter pawl and check the shift drum retaining bolt to make sure it will not loosen up on you in the future.

But do the easy things first, see if you cannot adjust out the noise first.
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Buellistic
Posted on Saturday, November 17, 2007 - 12:04 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

If the Primary Chain has deeply worn into the SHOE,chain adjuster it is an indication that the Primary Chain has or is being adjusted "TOO TIGHT" !!!
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Ozzyflash
Posted on Saturday, November 17, 2007 - 12:49 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks for the list of pointers. I'll order the gaskets today and dig into the project in the coming week. I'll post back with my findings.
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Ozzyflash
Posted on Monday, November 19, 2007 - 05:10 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Can someone with a parts book verify the part number for an '05 blast shifter shaft oil seal. I'm fairly certain it is the same as that for the sportster,p.n. 12010... but I want to be sure before driving 50 miles for a 99cent part.
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Ezblast
Posted on Tuesday, November 20, 2007 - 12:05 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

37101-84a
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Ozzyflash
Posted on Wednesday, November 21, 2007 - 10:37 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

So,,, I had a "duh" moment. After acquiring all the replacement gaskets to crack open the primary I settled down beside the bike to begin the work. Looking about the bike I noticed my oil drain hose hanging lower than usual. It turns out that my odd noise was the two drain hoses and mounting strap flapping about. After securing the hoses my noise is gone. : ) Thanks for everyones assistance.
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Gearheaderiko
Posted on Thursday, November 22, 2007 - 08:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

We've ALL been there at one time or another! Glad it was a simple solution and thanks for posting the outcome.
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