Do termignoni's require the exhaust valve?

[vomitbomb]

Hi All,

I took off the exhaust valve servo to install my ASB kit. The cable was still attached to the unit but it didn't look like it was doing anything. The attachment is still there for the exhaust but I wasn't sure if it was removed internally or left open etc.

Can anyone confirm whether or not I need this for a 2009 XB12R?

 

[thunderstormgrowl]

That cable only does acts on the stock exhaust. It opens the valve inside the pipe. If you no longer have a stock pipe, that cable does nothing.

 

[vomitbomb]

Yeah I've heard that but I was wondering why the attachments still there on the pipe. Maybe I just got the muffler section not the whole thing?

 

[vomitbomb]

Well it looks like the valve is still there. I didn't look inside but I can see the actuator on the side of the exhaust just before the muffler. I always knew it was there I just figured it was left open or removed when the Termi was put on. I did start the bike and rev it but the servo wasn't doing anything which lead me to believe it wasn't actually working/connected. Then again I don't know how it's meant to function.

I'm pretty sure I have the slip on then, just never realised.

Anyone care to comment?

 

[vomitbomb]

I was thinking of attaching the valve servo with 3M tape or something ontop of the ASB kit rather than drilling new holes into it. But is there an issue with just leaving the valve open?

I saw a thread where a guy just put zip ties all along the cable to hold it open. Here's the link:

http://www.buellxb.com/Buell-XB-Forum/Do-It-Yourself-Buell-Mods/quick-easy-exhaust-fun

Is this advisable? I'll open the airbox to play with this again.

Also, sorry about all the posts. I've got a lot of questions!

 

[thunderstormgrowl]

The valve WAS located in the stock muffler. Now that you have an aftermarket, there is no more valve. so that cable is doing nothing. you can leave it alone if you want, on the chance that you ever need/want to go back to a stock exhaust. What the guy in the DIY link did was rig the cable so it stayed open in the muffler.

 

[vomitbomb]

Cool.

The cable is connected to the exhaust. It's definitely not disconencted/dangling which is why it has me confused.

So the slip-on gets rid of the valve but not the attachment? I had the impression the valve was just before the slip-on/muffler.. ?

You can see what I mean in this thread:
http://www.badweatherbikers.com/cgibin/discus/show.cgi?tpc=142838&post=909696#POST909696

 

[vomitbomb]

This is what I'm talking about:

http://www.glowfoto.com/static_image/02-234213L/4215/jpg/12/2010/img5/glowfoto

And here:

http://www.glowfoto.com/static_image/03-001110L/6340/jpg/12/2010/img6/glowfoto

I've managed to lock it open using a series of zip ties and tubes Hopefully it all goes well.

 

[Stevenc150]

Spec. Ops. and Termignoni Pipes DO have a functioning exhaust valve just like the Stock pipe. That's in factory form, though you can request that it not have one when you order it.

 

[ich]

the termignoni valve will not improve torque as with the stock muffler, it's task is to reduce noise to comply with noise abatement constraints, where applicable.

 

[Stevenc150]

The Exhuast Valve I'm talking about is below and would have to affect torque:

I think the "valve" you're talking about ich is the adjustable Quiet insert that comes with it pictured below:

 

[ich]

reading is apparently not everyone's matter. i wrote "improve" not "impact". the valve i wrote about is the one before the muffler. it's simply a choke, reducing noise by limiting flow. it will not have an impact at low load, but has nothing in common with the valve used for the stock muffler, which is meant to "retune" the exhaust system according to engine speed.

 

[BuellerPilot]

^^What ich said^^

That's simply a choke. If there is any improvement in low end torque, it would be from a lack of tunning compaired to if that gadget was removed entirely and retuned you'd see quite noticable gains. Wire it open or better yet rip it out and re-tune the engine or at the very least get an EBR race ECM. If you run a stock ECM and don't want to retune or get an EBR ECM then leave it in and functioning. Don't confuse that gadget with creating more low end torque, it hurts... again it would only be perceived as a gain if left untuned as it would hamper flow so your air/fuel ratio would be simular to stock.

~Mike....

 

[Stevenc150]

- Learn something everyday. So the pictured valve & insert that come with the Termi pipe are for adjusting noise levels only?

 

[vomitbomb]

Hi All,

Like I said earlier I have wired this open but I don't think it's really changed anything that I can tell.

I figure it's better to leave open than leave shut.