Question about 2003 kawasaki KLR 250

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My 2007 Kawasaki KFX50 starts and idles fine, but after about 10 minutes of riding it acts like its either starving for fuel or floodind out. I have replaced the spark plug, air filter, cleaned the carb, drained and refilled the gas tank with new gas, and even replaced the entire exhast system with new stock exhaust from the local Kawasaki shop, but it still wont run for more than 4-10 minutes. I have to let it set for about a half hour before it will start and run again. Please Help ! Thanks Nate

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Unrelated Recall Alert: CLICK ME

Some articles I have read suggest removing the stock auto-choke carb and replacing it with a Honda CT70 Carb. Check with a local shop to verify, I do not own either and am just passing along the info.

Another solution suggested by 'OneRide': Try it with the gas cap off. The tank vent might be plugged. Possibly plugged fuel filter. Are you using the choke correctly?

This seems to be a very common problem and no 'one' solution to fix it.

I hope this helps.


Posted on Nov 29, 2009


Tony Elliott

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Valve adjustments? It’s 2 stroke guys

Posted on Jul 17, 2018



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If you've looked at the solutions suggested above and still haven't solved it, you'll have to dive into really analyzing the carburetor (Keihin PTE 16). The most probable cause is float needle problems. Don't neglect to check valve clearances, as you've mentioned that this is a heat-related problem, and valves with too close of a tolerance will cause just these symptoms. (Yes, the valves can most certainly get out-of-spec during run-in, although not probable.) You can check for too-tight valve clearances by the lack of compression on start. You should be able to feel this problem. Back to the carb - yes, this can be heat induced. I'm assuming everything is in it's stock place (if so, there should be no modifications necessary - it should run as designed very well) so that should rule out any vaporlock problems. You have a list of things now that you can check. Replace the kit parts in the carb when you've gotten to the end of the list. Good luck.

Posted on Nov 30, 2009

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