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Buell Forum » XBoard » Buell XBoard Archives » Archive through November 18, 2007 » XB Header Outlet Size « Previous Next »

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Glitch
Posted on Saturday, November 17, 2007 - 01:16 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

What's the header outlet size?
XB9 and XB12 are the same yes?
Thanks in advance!
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Fran_dog
Posted on Saturday, November 17, 2007 - 02:21 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

"What's the header outlet size?"

The O.D. of the inlet to the muffler is approximately 2.0625" or 2 and 1/16 of an inch for those of you that like fractions.

"XB9 and XB12 are the same yes?"

I believe so.

Hope that helps.
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No_rice
Posted on Saturday, November 17, 2007 - 02:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

the header outlet size is the same because my 9 and 12 pipes will interchange between my bikes. the diameter of the pipes them self are different though between the 9 and the 12
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New12r
Posted on Saturday, November 17, 2007 - 02:59 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You knew the answer to that, what is up your sleeve.
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Saintly
Posted on Saturday, November 17, 2007 - 03:00 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Oddly enough,
the header inlet diameter is also the same from 9's to 12's

When the 1200 pipe leaves the exhaust port of the head, it is the same diameter as the 984 and then it "steps up" in diameter for most of the length of the pipe before exiting at the same diameter as the 984 once again.

If my recollection of college physics holds true, it would seem that the 1200 pipe cannot flow more than the 984 pipe.

Combine that with the fact that the 9 and 12 heads are identical (as we learned this past August with Damnut & Hammers head swap), and that the intake manifold diameter was commonized after the first few years of XB production, and it would seem that the two engines are direct bolt in swaps.
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Glitch
Posted on Saturday, November 17, 2007 - 03:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Thanks guys!

You knew the answer to that, what is up your sleeve.
Just doing a little research for a project I'm thinking of.
Stay tuned
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No_rice
Posted on Saturday, November 17, 2007 - 04:18 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

You knew the answer to that, what is up your sleeve.

thats kind of what i thought...
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Glitch
Posted on Sunday, November 18, 2007 - 09:34 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I only knew about the 9 and the 12 being the same, I didn't know the outlet size.
This is going to be good.
Not an original idea, but, a good one none the less.
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