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Discussion Starter #1
well i got back just now from the dealer after having it put on,and here is my opinion on my bike, when i rode out of the dealers in to the city i thought YES much better much less snatch y throttle at low speeds, after about 5 mins i noticed that they had put it in tc3 which i very rarely use so i put it back on 1, it wasn't so good but still better than it was before, but when i got out on to my good roads as i say were i can go for it WHAT a difference it seemed much better no lag in the mid range at all and pulled much harder through the gears all the way to the top much better, low down in tc1 a bit better but much better all the way to the top, but if you ride in tc3 you will find a big difference at the low revs ,and on the down side the young mechanic who did it put a slight scratch on one of my panels which i wouldn't have seen straight away if he hadn't of said , he was very sorry and they have ordered me a new one so its ok,thought he was going to cry poor lad, so in my opinoin it is well worth doing
 

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Good result mate. I'm looking forward to having mine done next week. If it can smooth the transition from closed to open and sort the flutter under 3k I'll be stoked.
 

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It would be greatly helpful if someone has a dyno run before and after the new ecu change. On the same dyno and same day


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Discussion Starter #5
It would be greatly helpful if someone has a dyno run before and after the new ecu change. On the same dyno and same day


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the bit i cant understand is how come it seems to pull harder all the way to the red line now with the new ecu when it was only supposed to help at low revs
 

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Discussion Starter #8
Placebo effect.
no walter your wrong it is defiantly pulling harder through the gears all the way without the lag it had before around 5000 , i have been riding big bikes for thirty odd years at the lower revs where it was supposed to make a big difference it didnt for mine a bit better but not a lot unless i leave it in tc3 on the way home i was leading my mate on his new triumph 675r and he said he could not catch me like he could before i had it done
 

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All these evaluations seem very subjective? No one measured the diff between the old and the replacement?
what i find confusing is Suzuki clearly states the replacement ECU has no effect on throttle response yet those swapping them out swear its better. All I know is adjusting the TPS has completely eliminated throttle issues... try it
 

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The ecu change is for a 02 closed loop issue.
My bike was data logged by Suzuki and deemed ok.
My tps was far out of spec which gave the jerky throttle.
 

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I think Suzuki don't want to officially acknowledge the throttle response effect for cost reasons, but I saw a big difference on my bike on small throttle changes (for bigger changes I still get all the response from before) with the new ECU.
The surging on low load with constant throttle on the other hand I think was too big of a lawsuit risk to ignore and is the official focus of the new SW version.
Of course, if a customer complains enough about throttle response the dealer will probably change the ECU anyhow.
 

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All these evaluations seem very subjective? No one measured the diff between the old and the replacement?
...PERFORMANCE BETWEEN 2000 AND 6000 RPM ARE LOWER THAN BEFORE...:(

Take the time your gsxs requires from 2000 to 6000 rpm in 6th gear at full throttle.
It is easy to do using a movie cam (GoPro or similar).

If you all post your data we can compare the measures before and after the change of the ECU. :D
 

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...PERFORMANCE BETWEEN 2000 AND 6000 RPM ARE LOWER THAN BEFORE...:(

Take the time your gsxs requires from 2000 to 6000 rpm in 6th gear at full throttle.
It is easy to do using a movie cam (GoPro or similar).

If you all post your data we can compare the measures before and after the change of the ECU. :D
I have way too many better things to do first. By all mean, take notes, plot a chart and prepare a nice 3D bar chart of results. Or, better yet, ride it like you stole it and maybe plumb for a PCV/flash tune.

We are *not* going to get 100% satisfaction from Suzuki so let's all accept and move on. :D
 

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May as well give it the real test, 2000-12000 rpm in 6th gear with a GoPro so we can all see :)


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why not?
the topic is related on new ecu!:D
Because we all have slightly different views on what would be perfect. Add to that the "grass is always greener" effect. Someone else's runs better, someone else's doesn't have this problem.

After a while you go mad chasing your tail to find that mythical perfect something. Suzuki won't and can't be expected to provide that extra something. They make a bike that does 90% of what 90% of owners want. For the last 10% you need to customize it to suit your needs.

Also remember, this is a small but vocal percentage of owners. Many more are perfectly happy and couldn't give a toss for this forum or our views.

Fwiw, I'm heavily in the "mod it til you drop" faction.
 

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Suzuki won't and can't be expected to provide that extra something.
The japanese motorbykes that I owned in the last 25 years are perfect.
I expect my gsxs to provide at least the same performance of similar products. The reason why we all are discussing about the ecu is it's bad behaviour.

And now, if you want to talk about philosopy please start a new topic.
 

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*sigh*...No worries, I defer to your assumed superior product knowledge. Just a thought, with all these perfect bikes floating around I wonder how all these aftermarket tuning products manufacturers ever manage to stay in business...
 

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Hi Guy's, While speaking to the Service Advisor about the fueling/snatching issues on the GSXS, he said the Ducati 959 has the same whinges (Customer feedback).
Cars have to meet Euro 6 by 1/1/17, and new production starting from August 16 is to be Euro 6 compliant.
I assume bikes now have to meet a stricter Euro 4 same date, and just start when a new model begins.


What Yamaha did to the MT09 I don't know, but as the reviewers of the MT10 say it's more of the same thing; so perhaps Suzi just band aided the GSXR K5 engine for the GSXS to get it compliant, not in 2014, but back a lot closer to 2005, and mothballed the project when they nearly crashed Globally.


Then just tweaked the fueling software again even more leaner in 2014, as the emission tests stop above 60 kph / 4000 rpm area, or VW were just too busy to help out.


Rob.
 
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