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Gsxr 750 Acceleration Jerks

18K views 29 replies 16 participants last post by  adama55  
#1 ·
I have a 2011 Gsxr 750, Taylormade Full Exhaust system, K&N Airfilter, and Power Commander V, running a map specifically made for aftermarket intake with Taylormade Full Exhaust which I grabbed right off Dyno's Site. When I accelerate in any gear once i can only make it to about 10k RPMS before there is a violent jolt almost as if the throttle is getting cut. You can ride it as long as you want and its as if its a early ref limiter. Have searched High and low for the problem and only answer i have gotten is through it on a dyno because yes it is running a little rich. HELP! If you really wanna help me my Gtalk and gmail is my gsxr.com username. scotty0717
 
#5 ·
I would suspect a bad tune. Unplug the power commander or zero it out and see what difference it makes. If runs better up top take it and have a custom map made for your bike and mods on a dyno. You cant relay on someone else map and thinks its going to work great for you. Dyno tune yours and your response will be more crisp and smoother than it came from the factory.
 
#9 ·
As for everyone else, Yes I cleared out the old map and have even tried multiple maps since to me this seems like a AF ration problem and no such luck. Correct me if I am wrong but I do no think it would the TPS because in Neutral I can run the throttle all the way up to 14500 where the rev limiter kicks in. Can you change the rev limiter position? Also some people talk about a "timing retard eliminator" What the heck is that? and would this fix my problem?
 
#11 ·
Also some people talk about a "timing retard eliminator" What the heck is that? and would this fix my problem?
your gear position switch feeds into the ecu and it limits full power in lower gears. There is a device that makes the evidence think it's always in a higher gear. That's prob Wat They talking about.

Have u tried with No pc just stock ecu
 
#12 ·
As for everyone else, Yes I cleared out the old map and have even tried multiple maps since to me this seems like a AF ration problem and no such luck. Correct me if I am wrong but I do no think it would the TPS because in Neutral I can run the throttle all the way up to 14500 where the rev limiter kicks in. Can you change the rev limiter position? Also some people talk about a "timing retard eliminator" What the heck is that? and would this fix my problem?
In neutral the engine is under no load, so it does not rule out anything. I have read of a lot of people adjusting the TPS as suggested and solving problems so it woul pay to try it.

TRE http://www.gsxr.com/showthread.php?t=1789
 
#14 ·
Have I said that this thing is brand new? 2011 with like 2k miles on it..How the heck could something like the TPS or SVTA be messed up. I also have no lights coming on. Had the R1 light come on a couple times as the bike was doing its shuddering thing on me but did not pop any codes and went immediately off when I restarted the bike. So what the hells.. Ive read a few things about the "Exhaust Valve causing these problems"? I have a Taylor Made Full Exhaust system, Headers all the way back. No Cat, No Exhaust Valve. Which leads me to my question when I took off the cables that run from that "lil servo type arm" that hooks up to the cables running down to the valve on the stock exhaust could it be possible that its stuck of something from when I disconnected the Cables? And it is whats causing me these problems? Does anyone know if that "control servo thing" is electric or mechanical? again it would be awesome if someone who knew allot about bikes give me a shout on my email, gtalk, or on my phone. scotty0717 @ gmail.com and (352)535-0486. Thanks Justin.
 
#15 ·
Im assuming the "R1" code you think you saw is actually "FI" The code will go away when you turn off the bike. Search "dealer mode" and run your bike till it throws the code again. Then put the bike in dealer mode and report back with the code.

The servo motor your talking about is called the "set valve". If you have just disconnected the cables to the valve on the exhaust then that has nothing to do with your FI light or the acceleration problem your having.

The stva has known issues mainly on 04-07 models. Basically what happens is the actuator fails to move the secondary valves in the throttle body effectively cutting the available throttle by as much as 50%.

It could be something else entirely but alot of the time when the bikes rpm will not go over a certain level its either that issue, or a clogged fuel filter.
 
#17 ·
Correct I mean F1 light. It has only popped up twice and when I took my bike into dealer mode it was one of those codes, I forget which that the internet told me was just the bike calling wolf and nothing was really wrong with it. It was just after I had installed my bike and PC. I cannot get my bike to pop the F1 light again no matter how hard I try. If you guys could ride my bike im telling you. Its just like a rev limiter. You can run the throttle up in any gear and it'll hit what feels like exactly like a rev limiter. You can ride this as long as you want. Also I have called Taylor Made back when I thought this was only a AF Ration problem. They told me they could only give me what Dyno Jet has which is a Map labeled 2011-2012 GSXR 750 Full Taylor Made Exhaust with stock or Aftermarket Intake. Which I ran for the longest time originally when I installed everything. Since then I have reverted back to the stock map because I thought it was running rich and seeing if I could fix my herky jerky problem. And obviously it has not fixed anything.
 
#19 ·
Im 99.9% I have them plugged in correct. Its a pain in the ass to get to the but i plugged them in The lower "Brown" injectors. Ran the PC cable down the left hand side so the end of the injector pig tail should end up non the right hand side of the bike. Correct me if I'm wrong. 100% sure in have the TPS hooked up correct because you can watch the throttle move when you have the PC hooked up to the computer... So idk guys still stumped.. I've heard which makes no sense unless you are riding on a bumpy roads that it could be the kick stand sensor. Not to change the subject but should I bypass the kick stand and clutch sensor anyways so I can start the bike with out a clutch. And with the kickstand down in gear?
 
#20 ·
You can't bypass the clutch switch without installing a relay off the starter circuit. you can disable the kickstand switch, but I honestly wouldn't.
 
#21 ·
Hey guys something interesting happened yesterday. I haven't touched my performance modes ( A,B) since I did all the performance work on my bike. I switched into mode A yesterday and when I hit my imaginary rev limiter it still shuttered but it also canceled out my performance mode. What does this mean?
 
#22 ·
if you shut off the bike, it goes back to the default, which is fuel map a i believe. It stays there unless you change it into b. So this is a non issue. Turn it off, and your "performance mods" should come back into play, though I don't see how they would have canceled out.
 
#23 ·
I think you needed to read the rest of the post. I'm not really worried about my mode A kicking off and you actually don't even have to restart the bike, just hit your mode button again to toggle between A and B and they are there again. I posted this because this hasn't something to do with the problem I'm having. Almost positive its more than a AF ratio problem now. :-( any ideas guys and thanks for all the input so far.
 
#25 ·
you must have written that in a confusing manner...

as for your "ratio" problem, I would first rule out that you did a proper install. Yes you're going to say that's a lot of work, and you want an easier solution, we all see that coming. But considering that this system that you're using has been in place for a while now, and several riders have used it, I'm sure it's not a programming issue.
At this point, all you have is to uninstall the pcv, see if you still have the issue, or you can retrace your steps and make sure 100% that you did the install correctly.
 
#30 ·
I have a new 2011 Suzuki GSX-R 750, that I installed all the same, except I went with Jardine full exhaust, I'm not having the rev limit prob, but the power gain Jardine & power commander said I would receive I have not, the bike has slightly more at take off but nothing any where else, I was wondering did you see the big power gains the were claiming, I'm not impressed with mine, I have a dyno set up this winter but power commander says that with there tune there isn't much to gain even on dyno