GSXR1000 K3 won't go past 5-6k

[B0ndy]

Hello BCF,

I'm stuck...

GSXR1000 K3 has randomly developed a fault of not being able to exceed 5-6k RPM in any gear.

My first steps were:

- Replace plugs
- Oil and filter change
- Air filter change

Made no difference.

I then thought that it maybe the fuel pump.

So I bought a third party pump and fitted it to the fuel pump assembly but it's now tripping the fuel pump fuse.

I've likely installed the replacement pump incorrectly so it maybe worth retrying that..

My thinking is it's likely the fuel pump because nothing changed.. but not 100% sure on that.

Not sure where to go now, other than maybe buying the entire fuel pump assembly off ebay and trying that.



Any advice much appreciated
____________________
CBF 125 -> CB400SF -> GSX600F -> ZX6R (G1) -> GSXR1000 K4 -> ZX6R (B1H Stunt bike) -> VFR800 -> R1 5PW -> Sprint 1050 -> Fireblade 929 -> ZX10R C2H -> GSXR1000 K3

[cresad]

Hi , I'd be looking at the carbs myself. If there anything like the ones on the bandit they probably need a clean out.

Adam

[B0ndy]

[MarJay]

Is there a gauze strainer on the fuel pump? Did you change that too?
____________________
British beauty: Triumph Street Triple R; Loony stroker: KR1S; Track fun: GSXR750 L1; Commuter Missile: GSX-S1000F
Remember kids, bikes aren't like lego. You can't easily take a part from one bike and then fit it to another.

[Fizzer Thou]

Sounds like the exhaust valve is seized closed....

Had this on my Exup 1000
____________________
Just talk bikes.What else is there?

Always have a 'Plan B'

[jeffyjeff]

Did you think about connecting a diagnostic scanner to verify operating inputs/outputs? Could be as simple as TPS lost calibration. Probably better to unobtrusively and electronically probe the ECM before tearing stuff apart. in my opinion.
____________________
History shows again and again how nature points out the folly of men - BOC

[B0ndy]

Thanks all.

Sorted out the new fuel pump, took it for a test ride and the problem remains.

Ordered a new TPS sensor.. giving this a try next since it’s relatively cheap.

I should really be testing things before blindly replacing them…

Will give this a try next and see how it goes.

Noted on the exhaust valve, will check. Think it’s been fully removed by a previous owner but will have a look.
____________________
CBF 125 -> CB400SF -> GSX600F -> ZX6R (G1) -> GSXR1000 K4 -> ZX6R (B1H Stunt bike) -> VFR800 -> R1 5PW -> Sprint 1050 -> Fireblade 929 -> ZX10R C2H -> GSXR1000 K3

[jeffyjeff]

Since you're probably going to have to calibrate the new TPS when you install it, maybe you can play around with your old one first. With luck you can recalibrate the old TPS. Then you can send the new one back. https://www.gixxer.com/threads/throttle-position-sensor-tps-adjustment.291520/
____________________
History shows again and again how nature points out the folly of men - BOC

[Robby]

I'm pretty sure that last time a similar problem came up, I confidently suggested ignition trouble because it was a hard ceiling of 5-6k rpm in every gear, and the problem was the exhaust valve.

Those exhaust valves must really close up tight.

[B0ndy]

[B0ndy]