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 Post subject: xb12 muffler on an xb9
PostPosted: Thu May 14, 2009 12:15 pm 
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Hi - I have just bought a stock xb12 muffler (from Pash) which I am going to put on my xb9

I Need to lock open the Valve and just wanted to know if anyone has any advice on how to do it.

Cheers Andy


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PostPosted: Thu May 14, 2009 1:26 pm 
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Weld it open !

For advice, you could ask Tubbs as he is the fine purveyer of modified stock exhausts and will no doubt know what's best to do ...

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PostPosted: Thu May 14, 2009 2:10 pm 
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Thanks mate just pm'd him,

Is there a way to do it without welding it open?


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PostPosted: Thu May 14, 2009 2:11 pm 
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You will lose torque in mid rpm then, more than with an XB12.

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PostPosted: Thu May 14, 2009 4:18 pm 
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do you mean in general? Will I lose torque in the mid range if I were to spot weld it as well


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PostPosted: Thu May 14, 2009 5:43 pm 
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You lose torque if you let the valve open.

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PostPosted: Thu May 14, 2009 6:00 pm 
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Ok, so can I leave it as it is?


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PostPosted: Thu May 14, 2009 6:04 pm 
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The XB12 muffler with the valve closed is basically like a XB9 muffler. This topic had been discussed in the archived threads lately.

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PostPosted: Fri May 15, 2009 8:39 am 
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Sorry guys I cant seem to find an archive of this kind of topic. can someone post up a link

much appreciated.


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PostPosted: Fri May 15, 2009 8:54 am 
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I've been running a 12 muffler on my 9 for a fair while now.

Closed = quiet and good torque
1/2 closed is a compromise.
Open = sounds better but less midrange torque.

I have a bar mounted lever to adjust mine.
Image

Put it on the bike and wire the valve open, test it and see what you think.

I'm happy with mine.

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PostPosted: Fri May 15, 2009 1:25 pm 
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Thanks mate - exactly what I was looking for I like the manual valve adjuster you've done, i'm gonna give that a go myself.

did you have to do anything to your ECM?

Thanks - Andy


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PostPosted: Fri May 15, 2009 5:06 pm 
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proff. patpending
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:D

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PostPosted: Fri May 15, 2009 6:20 pm 
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why would you bother with the hastle, surely there is an aftermarket box that would save the worry of the valve setup and would be more suited to your engine charactaristics......xb12r user....

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PostPosted: Fri May 15, 2009 7:06 pm 
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proff. patpending
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Of course, but any muffler is a compromise. A Remus will behave similar to a stock exhaust with the valve open, a Reverso like with the valve closed... The Buell valve is there to give the best of both worlds...

If you really wanted to, you could buy a servo motor and set the ECM up to make it work like a 12. I know someone that will sell you the servo motor, the cable and the airbox lid.

I also know someone that will create you an EEPROM file to do the job :D

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PostPosted: Fri May 15, 2009 9:07 pm 
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Sounds good could you PM me a price or give me the name of the seller

Cheers


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