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Buell Forum » 1125R Superbike Board » Archives 001 » Archive through September 13, 2009 » Equal length headers « Previous Next »

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Blower1
Posted on Tuesday, September 08, 2009 - 01:43 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

I´m going to make a slip on type exhaust to my 1125R.
Have anyone tested equal length headers in 1125R?
I measured the original headers and the front one is about half of the length of the rear one.
This combination works, but equal length headers should give more power.
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1_mike
Posted on Tuesday, September 08, 2009 - 10:10 am:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

When a collector is used, the tube to tube length can be as much as 5" different without affecting power (torque or horse power).
These figures are good when working with a 4, 8 and 12 cylinder engine.
I see no reason why it wouldn't be the same for a twin.

Now if each of the header tubes is separate, no collector, then each tube needs to be the same length.

Mike
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1125rz
Posted on Tuesday, September 08, 2009 - 12:25 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

dris from twin motorcycles made his own & testing,hopefully he will make some with o2 sensor fitting for street use
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Carbonbigfoot
Posted on Tuesday, September 08, 2009 - 12:26 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Welcome, Blower1!

Jump right in. How long have you had your R?

Rob
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Buell_1125r
Posted on Tuesday, September 08, 2009 - 12:40 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Mike, where did you get that info on the header lengths?
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Blower1
Posted on Tuesday, September 08, 2009 - 12:50 pm:   Edit Post Delete Post View Post/Check IP Print Post    Move Post (Custodian/Admin Only) Ban Poster IP (Custodian/Admin only)

Hi Rob!

I have had my R about two month.
It´s a -08 model.
The R is a fine bike, but it needs some cosmetic & performance modifications.
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