GSXR 600 K6 - Throttle Body Actuator Issue

[TheArchitect]

Rode home last night, no issues and no signs of anything about to go wrong.

This morning went to start as normal and it appeared to struggle to get going. Once started, it bogged and stuttered for about 15 seconds then cut out.
Tried again, but this time it'll only start with some gas and even then really struggled to stay ticking over and cut out. Tried one more time to the same result. There was a bit more smoke than normal from the exhaust but not plumes and no burning smell either.

Battery is fine and there's plenty fuel in the tank.

One thing happened yesterday though... Where bike was parked all day, there was a steady and relatively heavy stream of water falling onto the bike over the dash and tank.

So any ideas before I start coughing up for recovery and garage costs?
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GSXR 600 K6 - Stolen
GSXR 600 K6 - Stolen
MT09 - Almost stolen

[.....]

I'd break out the WD40 and spray and hope for starters.

[jaffa90]

Did you open the fuel cap before the problem occured?
I`m thinking of water in the tank ,more so if it was holding water under the cap.
Did the ignition switch get wet or the kill switch?

[TheArchitect]

[techsnap]

+1 on the WD40.

My bet would be on wet electrics.

Spray round the plugs, leads etc so the WD40 can drive out the wet.

[TheArchitect]

[.....]

Coils/HT leads/spark plugs, get some WD40 in those areas and report back.

[TheArchitect]

Righto
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GSXR 600 K6 - Stolen
GSXR 600 K6 - Stolen
MT09 - Almost stolen

[.....]

Also, how do you know the battery is fine?

[TheArchitect]

[Wafer_Thin_Ham]

What colour was your smoke?
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[jaffa90]

[TheArchitect]

[Wafer_Thin_Ham]

[Wafer_Thin_Ham]

[jaffa90]

Sounds feesable at twopence worth.

[Robby]

Water in the fuel doesn't seem to be as much of an issue with newer injected bikes. I assume they're better sealed, and the emissions control bits make it harder for water to get in - particularly if the tank breather is going through a carbon filter.

Also with injectors you don't have a float bowl to gradually fill with water, just a fuel rail with a return back to the tank. The fuel is kept moving a lot more, so water can't settle in many places.

Fuel pump is a possibility, along with ignition electrics. Do as Joe said first and spray WD40 over anything that looks electrical. If that doesn't sort it, check the fuel pump output.

[TheArchitect]

Quick update:

Sprayed WD40 everywhere last night. In all the little crevices and anywhere there was a button or switch. Left it overnight to soak in and do its thing.

Tried to start the bike this morning and similar to yesterday it just about starts very hesitantly and only stays ticking over with some throttle. Lots of cloudy smoke. I was worried about keeping it running too long in case it causes bigger or longer lasting issues. As soon as I come off the throttle it dies.

Have arranged for bike to be recovered on Monday morning to my usual garage for their inspection and report. Have filed a report with building management at work as it's looking like the water leaking onto the bike is the cause of what ever the issue is.

Bummer really as the weather was looking decent next week.
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GSXR 600 K6 - Stolen
GSXR 600 K6 - Stolen
MT09 - Almost stolen

[.....]

Apart from the rough running there's no knocking sounds or anything like that? Oil level etc all OK?

I'd be tempted to get on it and ride it, let the engine get hot and it might clear the water from wherever it's managed to get into. How recessed are the plugs on these bikes?

[Wafer_Thin_Ham]

has it had some fresh fuel? Or have you drained bottom half of the tank(IIRC the water should settle on the bottom of the tank as it's more dense than the fuel).
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[TheArchitect]

[TheArchitect]

[Wafer_Thin_Ham]

Could something have been knocked loose when you tipped off of it a couple of weeks back? (Or was that someone else?)
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[TheArchitect]

UPDATE:

Just got call from garage. Problem has noting to do with the water after all.

Something about the throttle body and a butterfly valve being stuck open causing over-fueling. Apparently it's a common issue for the bike and is purely coincidence that it occurred when it did. It's been "reset" now and is running fine.

Couldn't get too much info over phone as at work, will pick it up tomorrow and get more detailed info on the issue, the possible cause and the fix.

thanks all for the feedback and info, much appreciated as always
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GSXR 600 K6 - Stolen
GSXR 600 K6 - Stolen
MT09 - Almost stolen

[TheArchitect]

I've updated the title of this thread to be more specific based on what I know now.

So the "fix" didn't work and again this morning I had the same issue - bike wouldn't start, then when it did it was very boggy and would cut out of not kept with throttle.

Very annoying, especially first thing in the morning when you're already running late for work. So I thought f-it and gave it some long hard revs before riding off. It seemed to get better as the bike warmed up but there were a lot of backfires.

The issue as I know it: Throttle body actuator (servo) is the culprit. It's not opening and closing the butterfly valves as it should which is causing the over fueling. I'm guessing the valves are stuck open.
The issue is probably the teeth on the servo arm or pinion are worn out.

I can't find anyone that sells the actuator on it's own, they only sell the whole throttle body unit which costs over £100 in most cases.

Does anyone know of a workaround or a more feasible solution to this issue?
____________________
GSXR 600 K6 - Stolen
GSXR 600 K6 - Stolen
MT09 - Almost stolen