06 Ninja 250 won't stay running unless choke is open - Sportbikes.net
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post #1 of 10 (permalink) Old 04-03-2008, 09:11 PM Thread Starter
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06 Ninja 250 won't stay running unless choke is open

I have an 2006 Ninja 250 that I gotta admit, did not winterize properly. just charged the battery up and finally got it started..I can ride it with the choke partially open but it I close the choke the bike dies.....Gas in the tank maybe a year old..I did put some Stabil in a few months ago...put some Seafoam in today...
Carbs probably all gummed up? Seafoam help at all?


ideas? advice?


Can ride the piss out of the bike but once I turn the choke off.....dies..can idle all day with choke open a bit abut will not stay running with it off



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post #2 of 10 (permalink) Old 04-03-2008, 09:28 PM
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Is this after the bike has warmed up or before?
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post #3 of 10 (permalink) Old 04-03-2008, 09:35 PM Thread Starter
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After..once I got it started I let it idle for quite a while

I rode it for about 20 minutes tonight with the symptoms I listed above


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post #4 of 10 (permalink) Old 04-04-2008, 10:59 AM Thread Starter
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Did some research and appears the pilot or idle jet may be gummed up

Hoping the Seafoam may break it up a bit...hoping but not counting

Not to good with carbs so not looking at the prospect of shelling out 3 bills to have them broken down and cleaned..oh well my bad ....doh!


Anyone ever have any luck with the Seafoam?



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post #5 of 10 (permalink) Old 04-04-2008, 01:34 PM
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You should drain the tank first.. I'd try some fresh gas... But it may already be too late..

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post #6 of 10 (permalink) Old 04-04-2008, 02:18 PM
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I would try fresh gas and run it quite a bit before taking it in.
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post #7 of 10 (permalink) Old 04-04-2008, 07:05 PM
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Gummed idle jet is definitely the most likely cause, but check the boot, spray some carb cleaner on the boot to see if the engine stumble.
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post #8 of 10 (permalink) Old 04-04-2008, 07:45 PM Thread Starter
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fwiw I was able to get the bike to idle on it's own without having to use the choke today. Wasn't able to ride(pouring out) except for some 10 foot rolls in 1st gear but the important part was it didn't stall without the having the choke open. Looks like the Seafoam did it's job to a point! I'm thinking a fresh tank of gas and taking it for a decent couple of spins and I might be back in business...


I mean yesterday this thing sounded like it was on death's doorstep...today after sitting with the Seafoam in it overnight it had a miraculous recovery! Did all the things peeps said Seafoam would make it do(pour smoke out of the exhaust for a bit) but then it cleared up.

2 thumbs up for this stuff!

What is the idle of a Ninja 250? 1000-1500?



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post #9 of 10 (permalink) Old 04-09-2008, 10:09 PM
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06 Ninja 250 won't stay running unless choke is open

You are on the right track. Try to get the carbs cleaned up and if that does not work check your valves. Valves that are not adjusted properly can cause a bike to run poorly. Go here to learn how to do a valve adjustment. How do I adjust the valves? - Ninja250Wiki On the Ninja 250 you can do this job yourself.

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post #10 of 10 (permalink) Old 04-09-2008, 10:56 PM
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definitely clogged pilot jets

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