Has anyone else experienced the "herky jerky" throttle off idle on a GSXR. I've searched forums and there is no real resolution. I've adjusted my TPS and installed a timing retarder eliminator but it still exists though the t.r.e. did help. It is only there after a hot restart. If it is started cold it will have a nice smooth throttle forever. It is especially troublesome when knee down in a corner and trying to balance the throttle around 2-3%. It seems to happen in any gear. It is stock other than the T.R.E. but I have a switch and can turn that off as well. It's as if the throttle shuts off when nearing 3% then when re accelerating it does nothing until reaching 3% then "kicks in" and goes. Thanks in advance for any ideas.
I put it in diag mode (jumper under seat) and it displays a bar on the insturment display as low,med and hi. I adjusted it to the upper part of the mid. BTW thanks for the quick reply and info!
i thought my bike was the only one that did that. i just figured my zuki wanted to go fast and not put around
I want to go fast and my mind is tellin me yes, but my body is tellin me no. But really, i hate hot restart off idle throttle response on my GSXR!
I'm having a very similar problem with by 07 CBR600RR. I don't know if mine is worse from a warm start or not since I just started noticing it this past track day at Barber. CBR's are known for being a little jerky at certain RPMs, but this past time it was way worse that it has been before ... to the point i felt like it might buck me off the bike. I have a power commander so this past weekend I reset the throttle position. the PC seemed to read 2% when the throttle was completely closed; so that may have been part (or all) of it for me. Do CBRs also have the STVA component mentioned earlier?
Are you mixing up jerky throttle with the suzuki chattery clutch issue? Try this put the bike on a rear stand and put it in gear, move the throttle and see if it is jerky. Then, put the bike in neutral and rev the throttle again. If it doesnt do it when you are in neutral, the clutches have been known to make a jerky movement at very low rpms. Ive seein it more on people that have taken the clutches out and put them back in. They get a build up of material on them and they dont seat right when taking off. trying to adjust the clutch usually only hides the issue for a bit. A couple things... how many miles on the bike? Rough miles like dumping the clutch for take offs or wheelies, or conservatively ridden.. couple track days and local rides? Troy
Did you ever fix the problem. I have 2 gsxr 07 with same problem. A 600 for the track was smooth then got all jerky. the 750 has been jerky for a while and been getting worse I dont even want to ride it anymore, also because thats for the street which is not much fun anymore. My friend rode my 600 for 3 laps at VIR last weekend and said how the hell i can ride it. So i guess i have been getting used to it. But its now to unstable to roll on in corners so I have to figure it out. My friend rides a 2009 gsxr 600 and has no issues, he now understands what im dealing with and has made me realize it's unsafe. Any help would be great. O I've have had 3 shops look at it and they cant figure it out 2 say theres no problem with it. other is clueless. So it's up to me now. Thanks
What kind of exhaust do you have? Did you disable-eliminate the flapper/valve underneath? On my 06 600 and 750's when they were stock they acted like that.. I then put on full exhausts and prob solved...
On my 600 i have a full Arrow system. when i first got the bike it was on there and was smooth. FI light on but throttle was smooth. I did a PC and a custom map made. I cant recall when the throttle started getting jerky. But im pretty sure it was not right after the mapping, maybe a few trackdays latter. The guy shop who did the map also did the something to by pass the flapper, with a jumper wire. Not sure exactly what though. The 750 has a 2 brothers pipe shorty ends by foot pegs, like stock length that was has been like it for a while, then a diffrent shop did a map to try and fix it. waste of money, yes more power but with no control of it its no good. im going to check the secondary throttle valve today, after BMX racing. I'll post what i find. Thanks for the reply.
Ok I checked flapper valve, it totally gone since it;s an arrow full system. I checked the secondary throttle sensor, seems to be fine I turned the key and ignition on and they opened all the way, i heard the motor moving sound electric etc. I even went a little further, removed the custom fuel map installed a stock map, since thats the last time throttle was smooth 100% when i first got bike. It ran like crap, like it need a tuneup when i was rolling the throttle on. And still jerky. So custom map is back in and i'm still lost!! Any more idea's Thank's
WOW I just reread Healea -coil's post. My valve maybe bad they only opened and never closed. I will call dealer tomorrow and post up. Thanks
Troy I have 5000 miles which maybe 80% track between me and old owner. I dont do wheelies, so no clutching up. Clutch chatter IM not sure what that feels like on a bike. If same as a car or truck then no. All the miles i put on it are hard miles, i dont believe in driving or riding anything easy, unless it broke and trying to make it home.
I have some issues with that on my SV. Turning up the idle on a track bike may help. I like my idle turned way up for racing and track days. The other thing I do, is use the clutch. As the rider, it's our job to make things work. In the wet, I'm all over that clutch lever to make sure off to on throttle transition is smooth.
Two dealers did not even give me the time of day to go thrugh it. They said no way is any part cover I been here 12 years bla bla bla. Formula one motor sports is checking into it and says they will call me back. But he did not think so, but is calling Suzuki for me i gave him both vin#'s I'll let everyone know soon i hope.
Forumla one said i may have better luck with suzuki Well i did not. guy on the phone kept saying weel pay the dealer to do all these test and we will see. All i was asking is is the part covered if it were proven by a dealer to be faulty. He was unable to understand the ? because he kept repeating him self. The good news I will pick up my bike in NJMP I had MDM fix the problem. I know Mike from the track and he seems real good at his job, and a cool guy to. He said he addjust the TPS, cleaned and reset some stuff on the power commander maybe Throttle postion not sure. But he says all fixed up, and he redid forks now so should be all set ready to ride.
Just to add to the post for future readers; a vacuum leak on the intake can cause this. Along with checking the tps is working, map is good, etc., also give the hoses and breathers around the throttle bodies and plenum a good review. Maybe the air box was off for a filter change or something and a hose didn't get connected all the way or fell off or was pinched. It won't cost anything to inspect it before you take it for service.
The bike ran great for two trackdays so far. What a difference knowing the throttle is going to be smooth. And Mike did the front forks to new springs etc. It took a few sessions to get used to it. Turn in was a little tricky at first. I never realized how hard i was working before until it was so easy.Before i knew it i was going faster and holding my line better.