Rpm problem - Suzuki GSX-R Motorcycle Forums Gixxer.com
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post #1 of 24 (permalink) Old 02-07-2016, 05:31 PM Thread Starter
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Question Rpm problem

I have a new 2015 gsxr 1000 and it won't go passed 8500 rpm. 1st gear does fine then I hit 2nd and it just dropped between 8-9k and it acts like its on rev limiter. Same thing in 5th gear. If I'm just cruising and go to fifth gear and open up it hits around that same 8-9k rpm range and cuts out. I havnt held it there because I'm scared it'll mess somthing up so I just let out. What is causing this?

Thank you.
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post #2 of 24 (permalink) Old 02-07-2016, 05:40 PM
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Re: Rpm problem

Are you getting an FI light? Any mods done to the bike? Give us all the info you can please.
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post #3 of 24 (permalink) Old 02-07-2016, 05:46 PM Thread Starter
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Re: Rpm problem

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Are you getting an FI light? Any mods done to the bike? Give us all the info you can please.
No f1 lights no mods. I just got the bike a few weeks ago. Few hundred miles. Completely stock
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post #4 of 24 (permalink) Old 02-07-2016, 05:51 PM
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Re: Rpm problem

Juat so you know, it is FI, not F1.



The bike is probably still under warranty, why not just bring it to a dealer?
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post #5 of 24 (permalink) Old 02-07-2016, 05:55 PM Thread Starter
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Re: Rpm problem

I just didn't know if it was a obvious problem for that year or somthing. Thanks
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post #6 of 24 (permalink) Old 02-07-2016, 06:22 PM
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Re: Rpm problem

No, definitely not.
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post #7 of 24 (permalink) Old 02-07-2016, 08:01 PM
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Re: Rpm problem

"it acts like its on rev limiter" So it comes on sharply rather than bogging down?

On something older I'd suspect a clogged fuel filter. But on a near new bike, that sounds more like a kink in the fuel line. But we need more information on exactly what's going on.

As a long shot, perhaps the EXCVA isn't opening. But that ought to generate a FI error. Damaged cat converter?
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post #8 of 24 (permalink) Old 02-07-2016, 08:19 PM Thread Starter
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"it acts like its on rev limiter" So it comes on sharply rather than bogging down?

On something older I'd suspect a clogged fuel filter. But on a near new bike, that sounds more like a kink in the fuel line. But we need more information on exactly what's going on.

As a long shot, perhaps the EXCVA isn't opening. But that ought to generate a FI error. Damaged cat converter?
I was in 5th gear and opened up the throttle and I looked down and it was around 8500. I knew it wasn't right so at the next stop sign I got on it a little in first gear, switched gears around 10k rpm to second gear and it cut power once again around the same rpm range. I've only been that high in rpms twice because I just got it, and both times this has happen. After about a second of the problem I let out of it. I bought the motorcycle brand new, there shouldn't be any damage to anything.
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post #9 of 24 (permalink) Old 02-07-2016, 08:24 PM
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Re: Rpm problem

Lift the tank and see if the fuel line is kinked...
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post #10 of 24 (permalink) Old 02-07-2016, 09:02 PM Thread Starter
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Lift the tank and see if the fuel line is kinked...

Fuel line is fine I just went and checked
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post #11 of 24 (permalink) Old 02-07-2016, 09:05 PM
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Re: Rpm problem

Next step is to take it back to the dealershiop and ask
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post #12 of 24 (permalink) Old 02-11-2016, 08:55 PM Thread Starter
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Next step is to take it back to the dealershiop and ask

I went to crank my bike earlier and the battery was dead for some reason? Then I thought the fuel pump needs 12volts to run correctly right? If my battery was weak and dying the fuel pump wasn't getting enough volts to produce enough fuel for the higher rpms I was trying to run, does this make since to you? Could that be the problem? Regardless I'm getting a new battery tomorrow, it's just to cold to ride and test to see if that's the culprit. Just trying to see if that makes since to anybody. And I'm guessing the battery is weak and dying because it sat on the showroom floor for awhile?

Thanks
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post #13 of 24 (permalink) Old 02-12-2016, 03:54 AM
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Re: Rpm problem

Before you just go and buy a new battery, test the one you have now.
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post #14 of 24 (permalink) Old 02-12-2016, 09:55 AM
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Re: Rpm problem

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Originally Posted by Eromezab View Post
I went to crank my bike earlier and the battery was dead for some reason? Then I thought the fuel pump needs 12volts to run correctly right? If my battery was weak and dying the fuel pump wasn't getting enough volts to produce enough fuel for the higher rpms I was trying to run, does this make since to you? Could that be the problem? Regardless I'm getting a new battery tomorrow, it's just to cold to ride and test to see if that's the culprit. Just trying to see if that makes since to anybody. And I'm guessing the battery is weak and dying because it sat on the showroom floor for awhile?
This is conceivable, but it has never happened to me, even when the battery was too weak to start the engine. I agree with what Anthony says above, in that it would be best to test the battery, and perhaps even the charging system (as it only requires a DMM) while you're at it.

Does the engine behave normally on all gears except two and five?
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post #15 of 24 (permalink) Old 02-12-2016, 10:44 AM Thread Starter
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Originally Posted by Eromezab View Post
I went to crank my bike earlier and the battery was dead for some reason? Then I thought the fuel pump needs 12volts to run correctly right? If my battery was weak and dying the fuel pump wasn't getting enough volts to produce enough fuel for the higher rpms I was trying to run, does this make since to you? Could that be the problem? Regardless I'm getting a new battery tomorrow, it's just to cold to ride and test to see if that's the culprit. Just trying to see if that makes since to anybody. And I'm guessing the battery is weak and dying because it sat on the showroom floor for awhile?
This is conceivable, but it has never happened to me, even when the battery was too weak to start the engine. I agree with what Anthony says above, in that it would be best to test the battery, and perhaps even the charging system (as it only requires a DMM) while you're at it.

Does the engine behave normally on all gears except two and five?
It's a new motorcycle, still in the break in period. I've only went that high in the rpms those two times. When I get home from work I'll put a volt meter on it and test it, should have around 13 volts at idle and around 14 volts revving around 3k. I'm almost convinced that's the problem. We will see
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post #16 of 24 (permalink) Old 02-14-2016, 03:26 PM Thread Starter
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Before you just go and buy a new battery, test the one you have now.
Okay so the battery is good. I just road it (27 degrees) and when the problem happens around 8500 rpm, I held it there this time and it slowly climbs rpm very slowly and then I just let out. But if you slowly open the throttle it acts fine like nothing's wrong but if you open the throttle all the way real fast it does fine till 8500 rpm and then it acts like its bogging down or somthing and goes up a mile per hour like every 2 or 3 seconds
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post #17 of 24 (permalink) Old 02-15-2016, 04:37 AM
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Re: Rpm problem

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Originally Posted by Eromezab View Post
Okay so the battery is good. I just road it (27 degrees) and when the problem happens around 8500 rpm, I held it there this time and it slowly climbs rpm very slowly and then I just let out. But if you slowly open the throttle it acts fine like nothing's wrong but if you open the throttle all the way real fast it does fine till 8500 rpm and then it acts like its bogging down or somthing and goes up a mile per hour like every 2 or 3 seconds
This is typical for a fuel delivery problem. You could try to troubleshoot, starting with taking fuel pressure and volume measurements, but why not just take it to the dealer, since it's still under warranty?

8500 rpm should be about the time the secondary injectors would start to kick in. These should also kick in under load only, so using little throttle you'd likely be ok, which is what you experience. Have you checked the delivery lines to those for kinks or other restrictions? (I have no idea how the layout/routing of the setup is on your model, or, in fact, any model with secondary injectors, so this suggestion might not be applicable.)

How do you know the battery is fine? Did you check the voltage, both with the engine off and running at about 3k rpm?
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post #18 of 24 (permalink) Old 02-15-2016, 09:16 AM Thread Starter
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Originally Posted by dpapavas View Post
Quote:
Originally Posted by Eromezab View Post
Okay so the battery is good. I just road it (27 degrees) and when the problem happens around 8500 rpm, I held it there this time and it slowly climbs rpm very slowly and then I just let out. But if you slowly open the throttle it acts fine like nothing's wrong but if you open the throttle all the way real fast it does fine till 8500 rpm and then it acts like its bogging down or somthing and goes up a mile per hour like every 2 or 3 seconds
This is typical for a fuel delivery problem. You could try to troubleshoot, starting with taking fuel pressure and volume measurements, but why not just take it to the dealer, since it's still under warranty?

8500 rpm should be about the time the secondary injectors would start to kick in. These should also kick in under load only, so using little throttle you'd likely be ok, which is what you experience. Have you checked the delivery lines to those for kinks or other restrictions? (I have no idea how the layout/routing of the setup is on your model, or, in fact, any model with secondary injectors, so this suggestion might not be applicable.)

How do you know the battery is fine? Did you check the voltage, both with the engine off and running at about 3k rpm?

The dealership is two hours away and I'm just trying to see if I can figure the problem out before going all that way. Yes I checked the voltage off and on at idle and at 3k, it was fine. I did check the top of the fuel line right under the gas tank.
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post #19 of 24 (permalink) Old 02-16-2016, 09:21 PM
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Re: Rpm problem

You haven't been very informative about the specifics of the problem, so I've stayed away. But it is beginning to sound like a fuel supply problem. A fuel pump flow rate test per the service manual would be helpful. However I still don't understand how the pump's filter could clog up in a couple hundred miles.
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post #20 of 24 (permalink) Old 02-17-2016, 12:14 PM Thread Starter
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You haven't been very informative about the specifics of the problem, so I've stayed away. But it is beginning to sound like a fuel supply problem. A fuel pump flow rate test per the service manual would be helpful. However I still don't understand how the pump's filter could clog up in a couple hundred miles.

That's all the information I have to provide. All I know is if I gradually open the throttle up It seems to run correctly to my knowledge. But if I open the throttle up fast and once the rpms hit around 8500 it hesitates and the rpms barly go up, once this problem occurs After about 2 seconds I let off the throttle because I don't want to cause further damage. also it does not do this in first gear, every other gear does it. I've checked the battery, the volts are reading right and the supply line is not kinked. I'm out of town for work and that's all the information I have
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