exhaust servo removal, yay or nay? : Honda CBR 600RR Sportbike Forum : 600RR.Net

sameh90 · 11-29-2012, 05:58 PM

anyone willing to share experiences about removing servo?

daisoman · 11-29-2012, 06:39 PM

Nay. I'm content with my sound at low rpms. Plus the argument of lost back pressure and Fi lights

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MikeyP · 11-29-2012, 06:44 PM

Only good if you remove the section with the flap and cat, and do the relay mod to remove the FI light.

**Moeman** · 11-29-2012, 07:05 PM

You can always remove the flap , cat valve , cables but leave the motor itself hooked up to the ecu and that will stop any FI lights from coming on that is what I have done to
my RR after installing my Akrapovic full exhaust system and never had any issues

daisoman · 11-29-2012, 07:12 PM

What are the gains in this? Louder exhaust note below 6-7k? No thanks. If I want to wake the neighbors ill just rev the $hit out if it in neutral. :@

tary preisser · 11-29-2012, 09:29 PM

daisoman you sound kinda grumpy!

anyway most who do this removal have full exhaust systems. generally shaving

20 lbs of weight,and...

you only save a lb.or 2 by removing the flapper motor.(1+ hr work)

some just disconnect cables and leave motor in place.(20 mins work)

for design for plug that lets you remove motor you need to read "Fix for FI light"

thread on this forum (thanks Alex Channell!)

daisoman · 11-29-2012, 09:57 PM

Lol not at all. Just curious what it actually did. 20 lbs is significant but doubtful it weights that much. If someone can confirm that's my next mod for winter.

Btw I have a LV slip on that's why IMO I don't need to be louder

daisoman · 11-29-2012, 09:59 PM

Nvm I re read 1 lbs. not worth it for me

sameh90 · 11-30-2012, 02:58 AM

Quote:

Originally Posted by daisoman

What are the gains in this? Louder exhaust note below 6-7k? No thanks. If I want to wake the neighbors ill just rev the $hit out if it in neutral. :@

i thought you gain some topend?

sameh90 · 11-30-2012, 03:05 AM

Quote:

Originally Posted by Moeman

You can always remove the flap , cat valve , cables but leave the motor itself hooked up to the ecu and that will stop any FI lights from coming on

i was talking about removing it on stock system..i have akra slip-on only.. and was wondering if i'll lose any mid-range? will it run lean and backfire or its not that much of a difference?

Quote:

Originally Posted by Moeman

that is what I have done to
my RR after installing my Akrapovic full exhaust system and never had any issues

well that is smart...but where did you hide/stuff that thing?

daisoman · 11-30-2012, 05:20 AM

Quote:

Originally Posted by sameh90

i thought you gain some topend?

I heard the same for my old Gsxr but u loose low end power. Don't know if applies to our bikes.

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**Moeman** · 11-30-2012, 05:50 AM

Quote:

Originally Posted by sameh90

i was talking about removing it on stock system..i have akra slip-on only.. and was wondering if i'll lose any mid-range? will it run lean and backfire or its not that much of a difference?

well that is smart...but where did you hide/stuff that thing?

You do not need to hide it you leave it where it's already sitting bellow the drivers seat

now in your case being its only a slip on why bother taking it off won't make a difference

AbnInf · 11-30-2012, 06:20 AM

Quote:

Originally Posted by daisoman

Plus the argument of lost back pressure

Losing back pressure is a good thing. Having the a/f tuned properly is the key. The back pressure myth is always confused with exhaust velocity.

daisoman · 11-30-2012, 08:51 AM

Quote:

Originally Posted by AbnInf

Losing back pressure is a good thing. Having the a/f tuned properly is the key. The back pressure myth is always confused with exhaust velocity.

Right. So this mod will require a remap to gain improvement. I'm curious what the actual numbers are?

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sameh90 · 11-30-2012, 09:00 AM

so as long as i have just a slip-on its better to stfu and keep riding? or in my case keep looking for that key...

daisoman · 11-30-2012, 09:03 AM

Quote:

Originally Posted by sameh90

so as long as i have just a slip-on its better to stfu and keep riding? or in my case keep looking for that key...

I say yes but that's IMO. Some say you get increased top end, now others say increased low end. How much is the bigger question. 1hp? But hey it'll only cost you time!!!

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sameh90 · 11-30-2012, 09:06 AM

Quote:

Originally Posted by AbnInf

Losing back pressure is a good thing. Having the a/f tuned properly is the key. The back pressure myth is always confused with exhaust velocity.

remap for just removing that flap? does it free up flow that much? i also find confusing as to why do we lose mid-range...doesn't make much sense

sameh90 · 11-30-2012, 09:08 AM

Quote:

Originally Posted by AbnInf

The back pressure myth is always confused with exhaust velocity.

which is...............?

**TST Industries** · 11-30-2012, 10:20 AM

If you do a full exhaust you will eliminate the valve anyway. If you just have a dummy servo bouncing around in your tray for the sake of keeping the FI light away then you can get a servo eliminator. We are working on a DSE (digital servo eliminator) that is a very small unit that plugs in with the OEM plug. We have road tested the prototype already and are in production. This part will be available in early January 2013.

http://www.TSTindustries.com

ahmedf · 11-30-2012, 11:06 AM

im sure i've seen ebay has a few of servo eliminators (just search "cbr600rr servo eliminator")

I had to remove mine with my arrow headers and used one from ebay. plug and play.

**TST Industries** · 11-30-2012, 11:26 AM

yea but buying off Ebay doesn't support your site sponsors ;)

ahmedf · 11-30-2012, 11:56 AM

but ebay has stock ;)

(plus im based in the UK so its just easier that i found a supplier in the UK)

**TST Industries** · 11-30-2012, 12:02 PM

word!...you got me. Ours are coming soon. I promise they will be smaller and better packaged, and better priced than all the others.

viprez586 · 11-30-2012, 12:18 PM

Quote:

Originally Posted by AbnInf

Losing back pressure is a good thing. Having the a/f tuned properly is the key. The back pressure myth is always confused with exhaust velocity.

http://www.hondacivicforum.com/forum...ts-wrong-3064/

http://www.veryuseful.com/mustang/te...Scavenging.pdf

Enjoy some reads. I encourage someone with a stock application to dyno they're bike with and without the servo hooked up. I'm sure you'll see a significant loss. Engineers didn't put it there for shits and grins.

Sure maybe if your ALWAYS at high rpm this might be beneficial.
Or when people modify the VE of the engine to allow more airflow into the engine to the point it becomes a restriction.
Increasing the exhaust flow without increasing the intake flow likely will do less good (or better torque curve for that matter) than increasing both.

But hey its your bike, do what you please.

Austicus · 11-30-2012, 01:40 PM

Don"t do it! Its a waste of time! I regretted doing it on mine.