Gsxr 600 srad surging at constant throttle - Page 2 - SV650.org

yorkie_chris · 11-12-13, 09:06 PM

Surprisingly not, what you need is cold-ish and humid. The evaporating petrol causes quite a temperature drop.

andrewsmith · 11-12-13, 09:21 PM

Pretty much what weather we've had this week.

11-12-13, 09:43 PM

Fair enough , i wondered whether there would be a scientific explanation to dismiss my naive thoughts

15-12-13, 05:15 PM

Had the carb balancer on and only one was out by a whisker so dont think it was that. However the rubbers where the airbox attaches to the carbs were on the looser side of things, so not sure if there was a leak there. Also pulled all plugs, they all looked the same and as expected.

Havent ridden it yet due to weather but il report back if my problem hasnt gone. Could it be the TPS?

yorkie_chris · 15-12-13, 09:35 PM

Loose carb boots a definite possibility.

TPS unlikely on a carbed bike, they make a minimal difference.

19-12-13, 08:31 PM

Problem still there, same as before. Is next step to clean the carbs out?

Bibio · 19-12-13, 09:40 PM

so constant throttle at 30-40mph but in what gear and what revs?

19-12-13, 10:05 PM

Well since it got a bit more frequent, id say its usuallly between 30-50. Not sure what gear but when revs will usually be lowish, 4-5k from the few times ive looked when its doing it. Whenever it happns i usuualy pick up the revs and it goes. It also can be a bit sluggish pulling away for a second or two, as if the amount of throttle ive twisted hasnt done anything, then suddenly the revs pick up too much, as if its on a delay. Not sure if this is related..

19-12-13, 10:43 PM

Quote:

Originally Posted by stuR

Well since it got a bit more frequent, id say its usuallly between 30-50. Not sure what gear but when revs will usually be lowish, 4-5k from the few times ive looked when its doing it. Whenever it happns i usuualy pick up the revs and it goes. It also can be a bit sluggish pulling away for a second or two, as if the amount of throttle ive twisted hasnt done anything, then suddenly the revs pick up too much, as if its on a delay. Not sure if this is related..

Similar to my Zx then. Feels a little sluggish down low but once above 4k it's normally fine. Idle is pretty s*** at the moment as well, even after a carb synch which in my case all were out a fair bit but all that did was smooth out the pickup from idle. Still surges at constant speed. hmmm...

Bibio · 19-12-13, 11:18 PM

i'll go out on a limb and say the coils are breaking down or the plugs are on their way out.

have you checked your oil level lately?

11-12-13, 09:06 PM	#11
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Gsxr 600 srad surging at constant throttle Surprisingly not, what you need is cold-ish and humid. The evaporating petrol causes quite a temperature drop. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

11-12-13, 09:21 PM	#12
andrewsmith Member Mega Poster Join Date: Apr 2010 Location: Newcastle upon Tyne, Just south of salad dodging country Posts: 7,750	Re: Gsxr 600 srad surging at constant throttle Pretty much what weather we've had this week. __________________ RIP Reeder 20/07/1988 - 21/03/2012. Always missed squire!!! Every year we meet old friends, gain some new ones, lose old ones and you always remember them all. “Live as if you were to die tomorrow. Learn as if you were to live forever.” Mahatma Gandhi

11-12-13, 09:43 PM	#13
stuR Guest Posts: n/a	Re: Gsxr 600 srad surging at constant throttle Fair enough , i wondered whether there would be a scientific explanation to dismiss my naive thoughts

15-12-13, 05:15 PM	#14
stuR Guest Posts: n/a	Re: Gsxr 600 srad surging at constant throttle Had the carb balancer on and only one was out by a whisker so dont think it was that. However the rubbers where the airbox attaches to the carbs were on the looser side of things, so not sure if there was a leak there. Also pulled all plugs, they all looked the same and as expected. Havent ridden it yet due to weather but il report back if my problem hasnt gone. Could it be the TPS?

15-12-13, 09:35 PM	#15
yorkie_chris Noisy Git Mega Poster Join Date: Apr 2007 Location: Halifax/Leeds Posts: 26,645	Re: Gsxr 600 srad surging at constant throttle Loose carb boots a definite possibility. TPS unlikely on a carbed bike, they make a minimal difference. __________________ Currently Ex Biker Now rebuilding a 63' fishing trawler as a dive boat

19-12-13, 08:31 PM	#16
stuR Guest Posts: n/a	Re: Gsxr 600 srad surging at constant throttle Problem still there, same as before. Is next step to clean the carbs out?

19-12-13, 09:40 PM	#17
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,561	Re: Gsxr 600 srad surging at constant throttle so constant throttle at 30-40mph but in what gear and what revs?

19-12-13, 10:05 PM	#18
stuR Guest Posts: n/a	Re: Gsxr 600 srad surging at constant throttle Well since it got a bit more frequent, id say its usuallly between 30-50. Not sure what gear but when revs will usually be lowish, 4-5k from the few times ive looked when its doing it. Whenever it happns i usuualy pick up the revs and it goes. It also can be a bit sluggish pulling away for a second or two, as if the amount of throttle ive twisted hasnt done anything, then suddenly the revs pick up too much, as if its on a delay. Not sure if this is related.. Last edited by stuR; 19-12-13 at 10:07 PM.

19-12-13, 11:18 PM	#20
Bibio Member Mega Poster Join Date: Jul 2008 Location: here as devil's advocate Posts: 11,561	Re: Gsxr 600 srad surging at constant throttle i'll go out on a limb and say the coils are breaking down or the plugs are on their way out. have you checked your oil level lately?

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