Question about 2003 kawasaki KX 250

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I have a 1998 Kawasaki kx 250 and there is fuel leaking from the carb it started once but it won't start again what could be the problem

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It sounds like the float,in the carb is stuck,,so not stopping fuel as it fills.....give it a tap on the bottom of the carb if no joy take off and clean,,,

Posted on May 29, 2011

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2001 kawasaki zx-7s won't start cleaned carb replaced hoses it started up after all this but now a week later the bike won't start and there is no leaks

Try this; in the event of a crash(or removing carbs) there is a magnetic charge that closes the needle valve preventing fuel flow. You may have to demagnetize the carb by grounding the frame. Usually, you can do this by running a wire from the carb to earth. Hope this helps.

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Apr 19, 2012 | 2004 kawasaki KX 250 F

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I have a 300 kawaski 4x4 atv and when i start it starts leaking fuel out of the carbuertor.

If it's the one I'm thinking of -it has a vacuum operated shutoff valve on the tank. So your leaky -read stuck- needle and seat only leak when the engine is turning over.

Pull the carb loose and roll over and remove the float bowl. drop the float pin and remove the float and needle. Find the vacuum line to the fuel valve and **** it open to flush out the needle and seat. When the fuel runs clean, put the needle and float back on and open the fuel valve again. If the upside down carbs holds back the fuel- it's fixed and you can put it back together.

May 26, 2011 | 1998 kawasaki KLX 300

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My kx 2005 was runnin great them started bogging randomly changed reeds top end and cleaned carb...

Well - not knowing the condition of the bike it could be a lot of things. I would start with a fresh spark plug, fresh fuel and a clean air filter. You say you already did the carb, reeds and top end - good. I assume you set the float level correctly. Did you pull out the petc0ck from the fuel tank - theres a filter that might be plugged up. Check your exhaust system for plugs - I've seen mice nest in pipes over the winter. If all this fails, look into your power valve system to ensure it's working and adjusted properly. If so, then do a leak down test - you might have a lower end leak. That's the best I can do without seeing or hearing it run. Hope this helped!

May 13, 2011 | 2005 kawasaki KX 125

1 Answer

2006 kx250f replaced head gasket will not start,good spark,fuel and compresion,could the timing be off

Hi,,,if you have drained the carb bowl to be sure there is fuel in the carb,,put a little fuel in the sparkplug hole,,and give it a few kicks,,,,if it dosnt want to start,,then yes i would look at the timing to make sure its lined up.

good luck

Mar 25, 2011 | 2006 kawasaki KX 250 F

1 Answer

2001 kx 85 has sever low end hesitation. I can't tune it to save my live. won,t idle properly. when at idle if you crack the throttle it will bog and then rev up

Hello you have a
1. fuel starvation problem clogged carburetor jets.(clean the carb)
2. Intake leak carb joint/intake manifold.( start your motor get it to idle best you can spray wd40 around the carb joint if the rpms change you have a leak replace the carb joint or gasket/o-ring as needed.
3. crankshaft main seal magneto side leaking or worn main bearing.
check end play on the magneto side remove the cover plate firmly grab the end of the shaft with up an down motion if you can feel it move replace the main bearings and seals.
These are problem that will cause your motor to run lean and hesitate.
Hope this helps you with your problem

May 10, 2010 | 2003 kawasaki KX 125

1 Answer

My 2004 kx 250f often starts with one kick when cold but after that even after 1-10 minutes idling if it needs to be started again it will take 15-25 kicks..

Dont twist the throttle at all when starting the warm/hot engine. The carb has a diaphragm fuel pump that gives a shot of gas each time you crack the throttle open. It is very easy to flood the bike.

Jun 06, 2009 | 2004 kawasaki KX 250 F

1 Answer

I have a kawasaki kx 250 2 stroke an it was running good now it wont start. it has spark it wants to fire up but it just backfires.

hi murray,

nice bike you have there.

have you checked on the carb ans see if the jet is right and the mixture is normal, this is usually the case if the carb is not tuned right.

better of reset the card, open it clean it, then set to default even if you are using your mixture of gas and 2t. just set to factory default. once it starts give it a few run, 1-2 hours, then set it to how you want your mixture to be.

hope this helps,



May 17, 2009 | 2003 kawasaki KX 250

2 Answers

1998/99 kx 125 fuel leaking from carb outlet at bottom

sounds like the needle and seat may be the problem

Apr 15, 2009 | 2003 kawasaki KX 125

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