Exhausts and Engine » Removing flapper box

Can someone tell me if the flapper box can be removed
if the factory exhaust is NOT being replaced? I bought
one of the Healtech ES Eliminator kits, but the question
centers around the removal aspect: If the box is removed,
what fills the "gap" left over from the removal of the box

thanks

On the pre-wethead bikes the flapper could be removed and a short interconnecting pipe inserted to fill the gap.
On wetheads, the flapper is part of the forward exhaust header. Could be eliminated, but would require some engineering and fabrication to complete.
You could possibly remove the shaft and weld the holes closed. Is it really worth the effort?

Frank

So my hunch was correct: You can only disable the box, not remove it?

Zitat von M3M im Beitrag #3

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So my hunch was correct: You can only disable the box, not remove it?

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maybe I am not understanding-

Disconnecting the cables and plugging in the servo eliminator is NOT the same as removing
the box that contains the flapper... You write "nothing goes in its place"
and that is because nothing was removed but some of its guts..

So is it correct to say that the box is not removed?

Maybe I'm not understanding you fella?
My interpretation of the flapper box is the servo housing,on the 1200 it can be removed. The servo buddy is plugged in and cable tied to the frame.
Though why you want to remove it while keeping the standard headers is a mystery. If you're changing the headers I could understand.
Care to shed some light on it for us?

We don't use the term fella unless implying sexual orientation, but whatever...

It is my understanding that the reason to fuck with it is to shed some weight...
So what is the advantage of merely disabling it?

So now that you understand my reason, the question remains, can you or can't you?

If you work this out, it would be VERY interesting to have measured "before and after" figures.
If the only change is more db or increased fuel use, the small weight loss would be achieved by a lithium battery.

Zitat von M3M im Beitrag #7

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We don't use the term fella unless implying sexual orientation, but whatever...

It is my understanding that the reason to fuck with it is to shed some weight...
So what is the advantage of merely disabling it?

So now that you understand my reason, the question remains, can you or can't you?

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Zitat von M3M im Beitrag #3

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So my hunch was correct: You can only disable the box, not remove it?

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thanks...

Zitat von Paul B im Beitrag #10

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Zitat von M3M im Beitrag #3

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So my hunch was correct: You can only disable the box, not remove it?

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Correct. It's built into the header pipes.

You can remove the servo and plug in the servo eliminator, but the exhaust flapper valve will remain in place (and permanently open).

Cheers

Paul B.

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Zitat von hyperm3 im Beitrag #12

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Zitat von Paul B im Beitrag #10

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Zitat von M3M im Beitrag #3

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So my hunch was correct: You can only disable the box, not remove it?

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Correct. It's built into the header pipes.

You can remove the servo and plug in the servo eliminator, but the exhaust flapper valve will remain in place (and permanently open).

Cheers

Paul B.

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What parameters cause this flap to open and close? How much louder is it when its kept open all the time?

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https://www.bennetts.co.uk/bikesocial/ne...an-exhaust-work

Interesting article...explaining the purpose of Exhaust valves that do more than reduce noise, and help to increase torque at lower revs, this article makes a good case for not disconnecting it on a road bike.... also 'Fugly' even gets a mention!



I'm keeping mine connected.

I checked when I bought my RS about 6 weeka ago that the flapper valve was indeed working (easy enough to do), because the valves had seized on my other bikes. I freed them off and they now work, but for how long, is anybodys' guess. Either way, it's an easy job to do.

I followed a video on YT showing how to do it, (and this is the interesting bit - well to me it was!), the guy doing it, then filmed the valve in operation whilst riding the bike.
As paul says, we may never know exactly the reason for its operation, noise reduction, better fuelling, etc.
Just my thoughts.

https://youtu.be/WO-pPKzu_NI