The exhaust servo motor controls the butterfly valve for the stock exhaust. When you turn on your bike you should hear it spin, thus opening the valve. You can remove the cables, with the valve in the open position, but this will throw an error code to your ECU and your FI light will come on.

All after market exhausts do not use this butterfly valve/servo motor set-up, so when you change out to an after market exhaust, your FI light will come on. Any (if not most) exhausts you buy should come with a servo block plate, a piece of metal that you mount onto the servo motor that makes the ECU think that the servo is doing its job. This plate puts resistance on the servo, just like the cables did when they opened the butterfly valve. I know that Two Brothers provides a servo eliminator/block plate.

If you want an alternative route, search for "cheaper servo eliminator" or "servo buddie" and you will find eJeremy selling an electrical servo eliminator that he has perfected to trick the ECU into thinking that the servo motor is doing its job, when in fact you take the motor out entirely and just use a small, light electrical device. This is what I use with my Two Brothers exhaust and it works perfectly.

As for right now, you have to get the servo motor back into its original position and reattach the servo cables to the motor and the valve. You can pull the code from the ECU to double check that it is the servo motor causing the FI light to appear, but after what you have just described it sounds like it is. You would just want to get that light to shut off in case anything else went wrong, the indicator would make you aware of it. Best of luck to you.

 

The exhaust servo motor controls the butterfly valve for the stock exhaust. When you turn on your bike you should hear it spin, thus opening the valve. You can remove the cables, with the valve in the open position, but this will throw an error code to your ECU and your FI light will come on.

All after market exhausts do not use this butterfly valve/servo motor set-up, so when you change out to an after market exhaust, your FI light will come on. Any (if not most) exhausts you buy should come with a servo block plate, a piece of metal that you mount onto the servo motor that makes the ECU think that the servo is doing its job. This plate puts resistance on the servo, just like the cables did when they opened the butterfly valve. I know that Two Brothers provides a servo eliminator/block plate.

If you want an alternative route, search for "cheaper servo eliminator" or "servo buddie" and you will find eJeremy selling an electrical servo eliminator that he has perfected to trick the ECU into thinking that the servo motor is doing its job, when in fact you take the motor out entirely and just use a small, light electrical device. This is what I use with my Two Brothers exhaust and it works perfectly.

As for right now, you have to get the servo motor back into its original position and reattach the servo cables to the motor and the valve. You can pull the code from the ECU to double check that it is the servo motor causing the FI light to appear, but after what you have just described it sounds like it is. You would just want to get that light to shut off in case anything else went wrong, the indicator would make you aware of it. Best of luck to you.

I'm pretty sure I have a stock CAT and headers before my M4 GP slip on-not sure. If I eliminate the servo with the servo buddy will it just stick the butterfly exhaust valve to the open position, and in turn be a little louder at idle? I wasn't sure if the servo buddy required a full aftermarket exhaust without a CAT.

 

Shouldn't be clicking like that after you reattached the cables, are you sure you started with the pulley back at the right place before re-attaching the cables? If not the ECU get's confused and trys to force the motor to spin the wrong way binding it up and causing that noise (AND DAMAGE TO THE SERVO). So try to get that straightened out asap if you plan on keeping that servo motor.

Or like NinjaRyder said, you can get my servobuddy and just rip all that crap out of there.

 

or like ninjaryder said, you can get my servobuddy and just rip all that crap out of there.

+1

 

i think its broke cause it just clicks like its not catching on a gear when i turn the key on and continues to keep clciking til i start the bike..it starts fine and sounds fine but the FI light is on..

What is the FI light? will i tear something up if i unhook the cables?
also what is the butterfly for in the exhaust? is that for back pressure?

 

If it's clicking before you start it it's probably stripped, what it tries to do when you turn on the bike is close the valve then open the valve to make sure it has full range of movement. If this doesn't happen a FI light comes on. The valve is to quiet the bike at idle, some say for back pressure too, but I personally don't believe that, the cat provides more than enough, I believe the valve is soley for emission and noise levels. Unhooking the cables will let the valve default to open, it shouldn't cause any damage at all, but you will be stuck with a FI light until you replace the motor or buy the eliminator. The motors don't cost too much, just be careful that you get a good one, I've seen some stripped ones for sale on ebay before.

 

yea its stripped which i probably did when putting the cables back on..do i need this servo motor and valve on the stock exhaust? aslong as the valve is open im ok right? then i can unhook the cables from the servo motor? correct me if im wrong...but thats what i did and it seems ok..
Also i rode the bike to the store the other night i let it warm up cause it was cool out but i turned off my street and took off when i was in 2nd gear about 9k rpm it just fell on its face hard..i let off the gas shifted into 3rd was fine..i left the store and again 2nd gear 9k fell on its face..felt like a govener kicked in...Does anyone have any ideas what this could be?

 

How affected is the bike if the servo is just de-activated and no servo buddy used?

 

+1 Finally installed my Boz Bros slip-on but the FI light came on even with the servo plate that came with the slip-on was installed :headscratch

Test rode the bike and no issues at all, for now...

 

i bought the servo elimitator from eE jeremy's site thats on his Sig and i just installed it its badass, no more than 3 inches long and it fits right next to the battey, best bang for your buck right there

 

I was thinking of purchasing the servo buddy, but decided to contact kawasaki U.K, and got myself the carbon akrapovic with the ex-up valve built in.
The bike sounds awsome with the bung removed while riding, but no louder than standard on idle.

 

Yup you officially stripped the big gear in the servo. I just took my exhaust off my 2011 zx6r today and forgot to leave the cable connected, its off at the headers to cat connection, and my servo got stuck. On top of that the rain began closing in and applied a time sensitive rescue. Sane heads prevailed and I disassembled the entire servo motor, should split into two half, and the two gears split one on each half, then you can adjust the one with the cables. and reassemble.
GENERAL ADVICE....IF SOMEONE OR SOMETHING PUT IT TOGETHER, AND IT IS A SERVICEABLE ITEM THEN IT COMES APART AND GOES TOGETHER THE SAME WAY IT COMES APART, BE PATIENT, AND YOU WON'T FUCK IT UP....LOL

 

A little piece of general advice:
If the cheap nylon gears get stripped out you can go to your local hobby store and buy a BRASS gear to replace it for $0.50.