2016 ktm 250sx-f won't start

Paw Paw 271
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Paw Paw 271 2/9/2016 11:09am
2/9/2016 11:09am
I have seen the fuel pumps come unplugged after crashes. When you try to start it. do you hear the fuel pump run?
Also check the kill switch.

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assu
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assu 2/9/2016 11:42am
2/9/2016 11:42am
Spark plug is sparking and i hear the fuel pump running when i start. I disconnected kill switch(plastic case), visually checked kill switch wire, seemed ok.
mb
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mb 2/9/2016 11:43am
2/9/2016 11:43am Edited Date/Time 2/9/2016 11:43am
Don't know about your bike, but on mine a sand crash (real sand) you need to try to flush out the kill switch or else it will act as if it is engaged.

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K-dubbb
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K-dubbb 2/9/2016 11:47am
2/9/2016 11:47am
mb wrote:
Don't know about your bike, but on mine a sand crash (real sand) you need to try to flush out the kill switch or else it...
Don't know about your bike, but on mine a sand crash (real sand) you need to try to flush out the kill switch or else it will act as if it is engaged.
This /\

Unplug your kill switch and see if it will fire.
assu
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assu 2/9/2016 12:49pm
2/9/2016 12:49pm
mb wrote:
Don't know about your bike, but on mine a sand crash (real sand) you need to try to flush out the kill switch or else it...
Don't know about your bike, but on mine a sand crash (real sand) you need to try to flush out the kill switch or else it will act as if it is engaged.
K-dubbb wrote:
This /\

Unplug your kill switch and see if it will fire.
Did that. At least i think so. Will try again just in case. Anything else? Have had crashes like this before. No problem.
Paw Paw 271
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Paw Paw 271 2/10/2016 6:37am
2/10/2016 6:37am
You say you have spark, right?
Is it a very strong Blue spark?
If not check the coil mounts for rust.
If ok, then do an OHK,s test on the coil.


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assu
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assu 2/10/2016 7:08am
2/10/2016 7:08am
Spark seems ok(at least i think so). Do you really think coil is broken, only 13 hours on the bike?
Paw Paw 271
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Paw Paw 271 2/10/2016 10:32am
2/10/2016 10:32am
It is most likely not broken, but dirty or rusty mounts will have an effect on spark strength and color. Doing the OHM test and making sure the kill switch is 100% clean and working will tell the story.
Also check every electrical connection for dirt and rust as well.
Make sure all the engine mounts are tight and free of rust as well.
How old is the fuel in the unit? If old it could have clogged the fuel system.
Have you also checked the valve clearances?

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assu
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assu 2/10/2016 10:48am
2/10/2016 10:48am Edited Date/Time 2/10/2016 12:43pm
Fuel is new. Checked most of connections. Kill switch seems ok with ohm tester.Should there be no spark ,if killswitch problem? I test tomorrow coil. But if nothing then i take it to mechanic. I am not very good with motors( at least repairing them).
smoothies862
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smoothies862 2/10/2016 6:05pm
2/10/2016 6:05pm
isnt there a tip over sensor that kills the motor so it doesnt starve for oil?maybe it went goofy with the crash. just a thought.i still would put money on the kill switch or related wire to it. was that the crash side? good luck.
SeaClassExpert 2/10/2016 8:41pm
2/10/2016 8:41pm
assu wrote:
I had a mild crash in sand track. When the bike was down it was running, then i turned it off(kill switch). After clearing my head...
I had a mild crash in sand track. When the bike was down it was running, then i turned it off(kill switch). After clearing my head i tried to start. It turns ,but wont start. Have tried the position sensor, new plug, checked the wires, plugs. Nothing. Not even a singel pop.

Have anybody had similar case?(Excuse the grammar)


Thanks.
Check the injector at the bottom of the throttle body and make sure that it is all connected. Had mine snap off a few weeks back, turned over but didnt want to start.
CarlinoJoeVideo
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CarlinoJoeVideo 2/10/2016 10:45pm
2/10/2016 10:45pm
smoothies862 wrote:
isnt there a tip over sensor that kills the motor so it doesnt starve for oil?maybe it went goofy with the crash. just a thought.i still...
isnt there a tip over sensor that kills the motor so it doesnt starve for oil?maybe it went goofy with the crash. just a thought.i still would put money on the kill switch or related wire to it. was that the crash side? good luck.
The tip over sensor is under the seat near the Ecu. Maybe check to make sure the ball is free.

If the kill switch was "engaged" I don't think the bike would spark?

Maybe your little in line fuel filter is clogged?
assu
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assu 2/10/2016 11:17pm
2/10/2016 11:17pm
Thank you all for taking the time to answer.

The tip over sensor was the first thing i checked, disconnected it and tried then. Nope.
The crash at least ended in the side, dont really know how exactly.
Will check the injector/throttle body again.
Allready changed the little fuel filter inside the fuel line.

One of our group had similar thing. Reason was that, timing chain skipped one thooth or someting and the timing was off. But it was older ktm 13 or 14.Thoughts?

CarlinoJoeVideo
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CarlinoJoeVideo 2/11/2016 5:38am
2/11/2016 5:38am
Is the FI light behind the number plate flashing any codes when your trying to start?
assu
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assu 2/11/2016 5:48am
2/11/2016 5:48am
No codes, at least none listed in manual. Its kind of hard to understand it like sometimes flashes sometimes not.
lumpy790
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lumpy790 2/11/2016 6:22am
2/11/2016 6:22am Edited Date/Time 2/11/2016 6:23am
Pull the air filter and squirt some WD40 down the intake while trying to start. If it starts then dies you know it's fuel related. Make sure the airbox is clean so it does not suck sand down the intake.
Pumice
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Pumice 2/11/2016 4:23pm
2/11/2016 4:23pm
Check your fuel filter connection. Unplug and make sure it snaps back into place. Cartwheeled my 450 last weekend and it wouldn't start. A friend noticed the connection looked loose. Pulled it apart and put it back together, fired right up. Dealership mechanic said he had heard of couple others doing it after hard crash

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CarlinoJoeVideo
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CarlinoJoeVideo 2/11/2016 11:53pm
2/11/2016 11:53pm
assu wrote:
No codes, at least none listed in manual. Its kind of hard to understand it like sometimes flashes sometimes not.
If you can shoot a video of it flashing next time. Maybe we can help decode it for you?
assu
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assu 2/12/2016 12:24am
2/12/2016 12:24am
Fuel filter connection checked. Thanks for trying to help. I gonna take it to mechanic today or in weekend. Cant ride next week anyway(knee still bad). I hope he will get it fixed. But if i remember,i can do the video of fi light.
assu
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assu 2/17/2016 9:15am
2/17/2016 9:15am
Problem solved. It still was fuel pump. It was klicking and working but not how it should. Crash did something with pump valves, dont know exactly( still not good with motors:D) but thanks again!
Pape718
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Pape718 2/20/2016 3:58am
2/20/2016 3:58am
A buddy of mine has 2016 350 the fuel pump assembly inside of the tank had a kinked line where the line was to long which cut off fuel. Ran fine one moto next it wouldnt start ktm took care of it

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