K7 GSX-R 600 Throttle issue

Gixxer21 · #1 16th July 2012, 12:29 AM

Well guys, fairly new member and am looking for some advice from the great amount of knowledge people on this site have!!

I installed a Laser Xtreme GP system (still using standard headers) on my bike (K7 GSX-R 600) and removed the S.E.T (Suzuki exhaust tuning) valve so the butterfly valve in the exhaust is always open. Now im experiencing a flat spot in the throttle at 8k-10k rpm. It dosent really happen in 1st, 2nd or 6th! mainly just in 3rd, 4th and 5th! It hits the flat spot and then can suddenly jolt past it and carry on with normal throttle range.
I know other riders with gixxers that removed the S.E.T valve and didnt experience the throttle flat spot so i dont think it's that, then again im not a mechanic.

Im currently thinking my problem could lie with the O2 sensor (even though im not fully sure K7's have these, havent checked yet) or the Throttle positioning sensor?

Any help is much appriciated, as it's ruining my life!!
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...Thanks in advance
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vimto-demon · #2 16th July 2012, 01:00 AM

Originally Posted by Gixxer21

I installed a Laser Xtreme GP system (still using standard headers)

It's not a system then
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Gixxer21 · #3 16th July 2012, 01:56 AM

it is what laser would call a system as u can buy the can without the cat or link pipe and that would be the slip on version. Laser do not make downpipes for the GP pipes so in the gp system u get ur end pipes and ur cat. And yes i see where u are coming frm too. But it is what laser call thier gp system. Thanks for ur help with my problem.

ilovemilkymoos · #4 16th July 2012, 06:52 AM

The S.E.T valve is used to smooth out the power delivery and recitfy flat spots during fuelling to increase torque and rideability.This is most helpful at lower engine speeds, where most of us do 90% of our riding.

I cannot understand why people take these out, they do serve a purpose and unless your riding you bike flat out everywhere (ie. a race bike) the only effect on the bike is a negitive one!

You need to get it re-mapped, either a power commander/Bazzaz Fi or similar, or if i was you, TEKA tune.

DLM do TEKA tune, no hardware to purchase (as far as i know) and all you need to pay for is the Dyno time and the use of his software.

cargo · #5 16th July 2012, 02:10 PM

This is yet again one of those great posts that keep me coming back here.

your bike was fine

you made a number of changes

a problem has now occured

you convince yourself that the fault is NOTHING to do with the changes you made

and you try and find fault elsewhere

Try putting everything back to where it was I bet that fixes it...................

Gixxer21 · #6 16th July 2012, 06:24 PM

Originally Posted by ilovemilkymoos

The S.E.T valve is used to smooth out the power delivery and recitfy flat spots during fuelling to increase torque and rideability.This is most helpful at lower engine speeds, where most of us do 90% of our riding.

I cannot understand why people take these out, they do serve a purpose and unless your riding you bike flat out everywhere (ie. a race bike) the only effect on the bike is a negitive one!

You need to get it re-mapped, either a power commander/Bazzaz Fi or similar, or if i was you, TEKA tune.

DLM do TEKA tune, no hardware to purchase (as far as i know) and all you need to pay for is the Dyno time and the use of his software.

Hi, thanks for the info...just wondering who DLM are? cheers
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mad maxx · #7 16th July 2012, 07:50 PM

Take the bike to John o Grady and he will remap the standard ecu
There's no need for a power commander or any of the other expensive shite
Jog tuning in Tralee
He did my k7 thousand and it had a similar problem and I came away with an extra 20 horses

dahev · #8 16th July 2012, 11:06 PM

Hey Lee. Daryl here. Give Steve in NDM a shout. Explain your issue and he'll say what needs doing over the phone. Sound man. 0872660432. Tell him i said to give him a call.
Good luck.

Gixxer21 · #9 17th July 2012, 11:58 PM

thanks for all da help lads, il keep ye posted on how i get on. cheers daryl buddy :)

slammedmind · #10 18th July 2012, 12:35 PM

Originally Posted by ilovemilkymoos

The S.E.T valve is used to smooth out the power delivery and recitfy flat spots during fuelling to increase torque and rideability.This is most helpful at lower engine speeds, where most of us do 90% of our riding.

I cannot understand why people take these out, they do serve a purpose and unless your riding you bike flat out everywhere (ie. a race bike) the only effect on the bike is a negitive one!

You need to get it re-mapped, either a power commander/Bazzaz Fi or similar, or if i was you, TEKA tune.

DLM do TEKA tune, no hardware to purchase (as far as i know) and all you need to pay for is the Dyno time and the use of his software.

The valve is a gimmic, i tore mine out because the cables siezed. They do fuck all and if anything the bike is better without it. If you have a k6/k7 then youll know why we take the valve out.

as for the op's problem, as the lads said possibly just a remap

ilovemilkymoos · #11 20th July 2012, 05:57 AM

Originally Posted by slammedmind

The valve is a gimmic, i tore mine out because the cables siezed. They do fuck all and if anything the bike is better without it. If you have a k6/k7 then youll know why we take the valve out.

as for the op's problem, as the lads said possibly just a remap

Completely disagree with ya!
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Nareik · #12 20th July 2012, 12:56 PM

Why not call John at Jog or Danny in Dlm or any one else that has the set up to put it right for ya. Mixed information from people who don't spanner for a living "might" put you in a worse spot than what you are like.

They "Might" know their shit too but how can you know that
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Obviously after your changes you need a remap if bike is not running smoothly.

As for taking cables or anything else off your bike I don't know. The lads mentioned already here definitely do as confirmed by those of us that paid them to get machines running right for us in the past.
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slammedmind · #13 23rd July 2012, 01:43 PM

Originally Posted by ilovemilkymoos

Completely disagree with ya!
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Thats your god given right so no worries at all. Plenty of people out there that have removed them with no adverse effects.
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