Servo motor ectomy

[BER18 100]

I have two choices at Rev Zilla for servo buddies?
I like the first pic but the date doesn't include 2023.
The choice in the second pic mean more zip ties. Any advice?

The first pic suggests they come in pairs. The second pic suggest I buy two of them?

 

[XUMERX]

The second one is the one I’ve seen people use here.

 

[Deleted member 1618]

I have two choices at Rev Zilla for servo buddies?
I like the first pic but the date doesn't include 2023.
The choice in the second pic mean more zip ties. Any advice?

The first pic suggests they come in pairs. The second pic suggest I buy two of them?

View attachment 13785

View attachment 13786

You'll need to purchase 2 servo buddy modules, one per exhaust system..

 

[Ulrich]

I used the one in the second picture ... and yes I needed to buy 2.

 

[RyBread]

I used the top one. I used bmw s1000rr for the model. came with a pair so no need to buy two.

 

[BER18 100]

Thank you for that info. Looks like I could save money with the top choice.
Not sure what the years specification really means.

 

[paolo]

Will you pass emission test doing the servomotor ectomy?
The exhaust valve will be permanently open basically?

 

[RyBread]

Will you pass emission test doing the servomotor ectomy?
The exhaust valve will be permanently open basically?

Depends on your location emission testing... If your states side, I highly doubt it will fail... our bikes (well technically yours since I just sold mine) have wide band oxygen sensors that will tell the ecu to adjust for the exhaust flow

 

[BER18 100]

Will you pass emission test doing the servomotor ectomy?
The exhaust valve will be permanently open basically?

Paolo, no emission test in KS.

 

[Ulrich]

No tests for motorcycles in Oregon either ... asides that I don't see what the flapper would have to do with the exhaust gas mixture that is coming out ... it just baffles the sound in idle and low speeds ... IMO

 

[dannyleo]

I thought it did more than just baffle sound. I thought it provided a slight, extra back pressure for smoother running and better response at lower rpm’s?

 

[BER18 100]

Without knowing the details, I saw the exhaust flappers as overkill.

 

[Ulrich]

I thought it did more than just baffle sound. I thought it provided a slight, extra back pressure for smoother running and better response at lower rpm’s?

I did not noticed any change in performance (mine are removed) ... just a little more growling in idle and in low speeds ... no changes in throttle response or performance ... from what I can tell (seat of my pants, not dyno data)

Without knowing the details, I saw the exhaust flappers as overkill.

... same, something to appease the authorities in Europe and Cali

 

[cbigclarke]

OP could you put up a link