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-   -   SET Valve Mod Question K6-K7-K8 600/750 (Updated w/K5-K6 1k info) (https://www.sportbikes.net/forums/suzuki-sportbikes/341543-set-valve-mod-question-k6-k7-k8-600-750-updated-w-k5-k6-1k-info.html)

suzukilover 02-03-2007 01:04 PM

SET Valve Mod Question K6-K7-K8 600/750 (Updated w/K5-K6 1k info)
 
I Heard That U Can Bypass The Set Valve And Take It Completly Off And Do Somethin With The Ecm To Bypass The Code For Better Sound And A Few More Ponies. How Do U Do It?

jk750 02-03-2007 03:51 PM

I'm surprised this doesn't come up more often. It's pretty easy to do, but it will only give you 1-2 additional horsepower on a 600/750, and a little more sound. Are you sure you want to do this? Do you want to disable or replace the SET valve?

I guess the real question is do I really want to type out all the instructions??? :onfloor

I disabled the SET on my '04 to smooth out the throttle response. It helped a little bit. Maybe a little better sound, but that was with a stock can. I put it back to stock for some reason when I got my Akra slip-on and got a dyno tuned PCIII, and that worked even better.

Also, for checking the adjustment of the SET valve cables, check here >>> https://www.sportbikes.net/forums/suz...e-display.html




suzukilover 02-03-2007 04:44 PM

im not too worried about the ponies, i just heard that it made the exhaust sound a little meaner. and whats the best.....remove or replace? what can u replace it with?

jk750 02-03-2007 05:39 PM

4 Attachment(s)
Alright, here goes... this is for disabling the SET valve.

The SET valve's servo motor resets itself every time you turn the ignition on. First it rotates clockwise fully closed, then counter-clockwise fully open, and then clockwise again until it stops, the valve stays about one third open. This is the position used at idling. You need to understand this cycle because you will be disabling the valve in the fully open position! It take a couple seconds to cycle, so you'll have time to do it.

1. Turn the ignition on until the SET valve rotates FULLY OPEN. Turn the ignition off immediately before the valve can move back to the starting position. It is now set fully open. You can remove the muffler and look down the pipe with a flashlight to verify that it's open if you want to.

2. The SET servo motor is in the right side of the tail section attached to the sub-frame. Unplug the 2 connectors that come from the SET valve motor and tape them up.

3. Here's the fun part. You want to make that pesky flashing FI light go away, right? 'Cause it will flash with this mod, or if you install any aftermarket full exhaust. First, find your ECU. It's the BLACK box next to the grey box under the seat with the BLACK wiring connector attached. Unplug the black connector. Now locate the #30 wire. What's the #30 wire? It controls the FI trouble light for the SET valve system. Nothing else.

4. There are two rows of wires in the connector. The top row is #1-17 and #18-34 are on the bottom. So number 30 is on the bottom when connected, 5 wires over from the far right end. When you unplug the connector and turn it over you can see it as pictured below. It should be black wire w/brown stripe. Don't worry too much what color it is. Looking closely you can also see the numbering on the sides of the plug - 30. Disconnect this wire. Just gently pull it out, you don't need to cut it but you can if you want. It should come out very easily, but you may find using a tiny screwdriver helps. Tape the metal part of the wire up and then reconnect your ecu.

Enjoy your free unobstructed exhaust system and possibly some extra hp!

UPDATE FOR K8 600/750 OWNERS - If anyone is looking to do this on their K8 you need to remove the wire in pin #5 and it's the Black wire with a White tracer.




suzukilover 02-03-2007 07:25 PM

:phatyo u r the man. much love

suzukilover 02-03-2007 08:55 PM

what color is the wire at the ecm? just makin sure i got the right one.

jk750 02-03-2007 10:08 PM

3 Attachment(s)
:lol

Cut the red wire...





























NO WAIT!!! :blowingup

#30 is the black wire with the brown stripe and is 5 wires from the far right end. If you decide to remove it instead of cut it, a tiny flat blade screwdriver will come in handy.



More pics of the SET valve in operation. Open, closed, and semi-open idle position.

I'm going to do this mod again tomorrow. I can't remember why I ever went back to stock.




suzukilover 02-04-2007 11:58 AM

sweetness. thanx again

hi im drummer03 02-11-2007 09:50 PM

Is there anyway to know if its open without taking exhaust off..Is it worth doing on the 1k?Also i noticed it tends to make the FI light go off even more when you have a aftermarket exhaust..Do you have to do this with aftermarket exhaust?Also when you buy a TRE mod what is that doing differently?After reading even if it adds a few HP cool..my main concern is if im reading this it also makes the rolling acceleration open more agressively instead of rolling on smoother and not as agressive..is this true?

jk750 02-13-2007 07:01 PM

If you follow the instructions, and follow the cycle of the SET valve when you turn the key on, you can figure out when it is open or closed.

Or, after you unplug/disable the servo motor, you can manually open/close the valve with pliers while the engine is running.

Open = louder, closed = quieter.

If you have an aftermarket full exhaust, your SET valve went away with the original exhaust into the corner of your garage. You will want to unplug the correct wire in the ECU to eliminate the flashing FI light, and get rid of the actuator cable, and the servo motor if you want.

Once you unhook the servo actuator cable, the SET valve will automatically snap OPEN and stay there.




suzukilover 02-14-2007 10:26 AM

i unhooked the cables and loosened the nut on the set valve and it got really loose. i tightend the nut back up but the valve was still loose so i had to reconnect the cables. what happend?

jk750 02-14-2007 10:38 AM

I dunno... Who told you to loosen the nut on the SET valve??? Wasn't me.
Is the SET valve main spring still properly in place, as it is in the pics in post #7?
Sounds like you sprung the spring.




suzukilover 02-14-2007 03:14 PM

DAMMIT!!!!!!!!!!! i think i did. i tried tightening it back up but the damn thing is still loose. damn me

jk750 02-14-2007 07:08 PM

Is the spring still attached and working? If the spring is working the valve will stay in the open position.

If the spring isn't attached, re-attach it.

Next time, follow instructions! :lol




suzukilover 02-14-2007 07:45 PM

the spring is still attached but i think it unwound a little bit. i just need to twist it around a little bit more i think.

jk750 02-14-2007 08:08 PM

Count the spring windings in the first and third pic in post #7. Make sure yours is the same - 5 windings.




suzukilover 02-14-2007 09:20 PM

aight

hi im drummer03 02-15-2007 11:55 AM

So i think i have got thi down...
If you wait for the valve in thre exhaust to open up,turn the ignition off,unplug the plugs going into sensor and remove or cut brown wire #30..This is like diong the TRE mod except your gear counter still works?

jk750 02-15-2007 12:43 PM

Dude, seriously... are you trying to drive me to drink. :alky

This has nothing to do with the TRE mod.




suzukilover 02-15-2007 08:26 PM

whats the TRE mod?

jk750 02-15-2007 10:20 PM

Timing Retard Eliminator. Subject for another thread.

Or - https://www.sportbikes.net/forums/sho...d.php?t=342349

Or - :google TRE. Basically its a plug in resister.




gsxr_fan2003 03-06-2007 07:38 PM

so i figured out over the weekend i dont have a set valve

jk750 03-06-2007 08:26 PM

:onfloor :lao

No worries then, it's already been removed! :lol

600 and 750 models got them in '06. The 1k got it in '03.




gsxr_fan2003 03-06-2007 09:48 PM

Quote:

Originally Posted by jk750
:onfloor :lao

No worries then, it's already been removed! :lol

600 and 750 models got them in '06. The 1k got it in '03.

but was it supposed to have it? lol

coronadozx 03-13-2007 07:36 PM

jk,
what level of mechanical aptitude is required for this project?

i can do the basic maintenance (change oil, plugs), and more importantly, follow instructions well.

will i be okay doing this w/out screwing up the '07 gsxr 600?

jk750 03-13-2007 07:48 PM

Mechanically, it's very simple. Just follow the instructions and you'll be fine.

https://www.sportbikes.net/forums/sho...d.php?t=344443




coronadozx 03-13-2007 08:01 PM

thanks man.

toyotapower 03-13-2007 09:06 PM

hmm, sounds pretty simple. so what exactly is the purpose of the set valve. from what i understand (please correct me if i'm wrong) the purpose is to control the sound waves coming from the exhaust side of the engine. it changes the shape of the exhaust to make the bouncing sound waves return at the correct time (kinda like why a two stroke exhaust has a specific shape). so if im correct on that assumption, what are the possible consequences of taking away this valve?

jk750 03-14-2007 01:45 AM

It's basically a sound reducing device. The US EPA and several other nations' regulator bodies require a 'pass through' noise test, as well as stationary noise requirements. Suzuki, and others, have found a way to pass these tests without significantly hurting performance by closing this exhaust chamber valve at strategic moments commensurate with test requirements.

To pass these tests without this type of valve would require a far more restrictive and power robbing exhaust system.

The sell this device to the consumer as a 'power enhancing feature' to discourage it's removal, or at least to discourage it's disdain.

In fact, it has been shown on the dyno that this type of obstruction in the exhaust collector does not enhance power, but does in fact diminish it to some degree.

If it was a true power enhancer, every racing motorcycle and every aftermarket pipe bender would have them installed on their equipment.




genes81 03-14-2007 03:02 AM

I did this mod tonight after I got out of work and it took me about 15 min. I didnt really notice a difference in the sound but then again it was still in my garage..its was raining outside. One question, when I take my bike in to get serviced, should I reconnect everything to stock so they wont mess with me about the warranty? By the way, awesome directions a:cheers nd pix!!

jk750 03-14-2007 10:59 AM

Thanks!

As for getting it serviced and warranty, that's up to you. Remember, if you installed a full exhaust you would be doing the same thing.




toyotapower 03-15-2007 12:07 AM

well i did the mod today.... and now my bike doesn't start. the tach goes up to redline and back (like normal). the fuel injection sound starts up and cuts out when the needle reaches redline. then the fi light blinks. so i'm a little fucking pissed off right now. followed the directions. first i set the valve so it was open, then i disconnected the connectors to the actuator. then i took the black connector of the ecu off, took off the fifth wire from the right on the bottom (which was not black and brown btw). it didn't start. so i put it all back together the way it was and it still won't start. i don't think i fucked up any of the connectors, i inspected them and they look fine. so i guess i'm gonna have a fucking wonderful time tomorrow digging through that shit trying to figure out what the hell went wrong.

jk750 03-15-2007 10:42 AM

Sorry to hear you're having a problem, bro! Countless people have done this mod with no issues at all. I suspect you might have clipped the wrong wire? It should be a Black wire with Brown stripe, but the most important thing is the wire connector number.

Or maybe the harness isn't tightly connected.

You did unplug the BLACK wiring harness connector, not the grey one...
Number 30 is on the bottom when connected, 5 wires over from the far right end. Double check that it says #30 on the connector. You might have been looking at it upside-down?

Is everything reconnected properly? Harness tightly connected?
There's no reason why the bike shouldn't start if everything was done the right way! The only function of the #30 wire is to signal the instrument panel of a faulty SET valve.

You might want to check with genes81 or kazlab67 and have them walk you through it. kazlab67 just did this mod with no problems. Let us know.

https://www.sportbikes.net/forums/sho...d.php?t=344443




genes81 03-15-2007 02:00 PM

Hey jk750, I know this is the wrong thread for this, but what are your thoughts on the TRE mod? Worth is or not?

toyotapower 03-15-2007 02:28 PM

Quote:

Originally Posted by jk750
Sorry to hear you're having a problem, bro! Countless people have done this mod with no issues at all. I suspect you might have clipped the wrong wire? It should be a Black wire with Brown stripe, but the most important thing is the wire connector number.

Or maybe the harness isn't tightly connected.

You did unplug the BLACK wiring harness connector, not the grey one...
Number 30 is on the bottom when connected, 5 wires over from the far right end. Double check that it says #30 on the connector. You might have been looking at it upside-down?

Is everything reconnected properly? Harness tightly connected?
There's no reason why the bike shouldn't start if everything was done the right way! The only function of the #30 wire is to signal the instrument panel of a faulty SET valve.

You might want to check with genes81 or kazlab67 and have them walk you through it. kazlab67 just did this mod with no problems. Let us know.

https://www.sportbikes.net/forums/sho...d.php?t=344443

i got it figured out, i was looking at it upside down. so the wire i pulled was actually to the tip over sensor (obviously the bike doesn't start with it not connected). it was kind of a bitch to get it back in there and make contact with the male end of the connector. but i got it in there, the correct wire is pulled now and everything is working fine.

jk750 03-15-2007 05:28 PM

sexybikerpimp, glad you got it up and running again! :dblthumb

Now we know what that other wire is for. Yep, that'll definitely prevent the bike from running. :lol

Post up what you think of the mod after riding with it for a few days. Do you notice a difference, is it worth while?




jk750 03-15-2007 05:33 PM

Quote:

Originally Posted by genes81
Hey jk750, I know this is the wrong thread for this, but what are your thoughts on the TRE mod? Worth is or not?

That depends... I have them installed on both of my bikes. Never rode the 600 without it, so I don't know. Made a noticeable difference on my 1k.

Probably not much difference on a 600... You can start a thread about it if you want to discuss it further.




toyotapower 03-15-2007 10:58 PM

Quote:

Originally Posted by jk750
sexybikerpimp, glad you got it up and running again! :dblthumb

Now we know what that other wire is for. Yep, that'll definitely prevent the bike from running. :lol

Post up what you think of the mod after riding with it for a few days. Do you notice a difference, is it worth while?

yes, i think it is worth while. the sound is an improvement for sure. as far as increasing power i haven't noticed anything. maybe a little more smooth. but its a mod i've been wondering how to do for a while. i messed up the set valve pretty bad in september at the track so its been zip tied and duct taped together at times. glad to finally have it off. and it should make installation of a full system a breeze. so yeah, thanks jk.

jk750 03-15-2007 11:01 PM

Glad it worked out for you! :beer




genes81 03-18-2007 06:43 PM

My bike didnt like this mod at all..It was louder but the rpms wouldnt get up over 6500-7000..I called the dealer and they told me the only thing they could think of was that they overserviced my engine with oil, or the exhaust control valve was not working and it wasnt creating enough back pressure to make the power....the oil level was fine and sure enough, I put the mods back to stock and it ran like a champ...not sure why it did this, I know the set valve was in the open position, i counted the cycles and I even took off my exhaust to make sure I did it right..oh well!


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