2017 KX250F starts then dies

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5/1/2017 8:56 PM

Son rode practice then killed bike for lunch. Now it will fire up for like 2 sec then die. I'm looking at the valve gaps tomorrow. I was just wondering if anyone could tell me what else to to check.


5/2/2017 4:31 AM

Check the fuel pump filter (in the fuel tank).


5/2/2017 4:59 AM

Agreed. Start with the fuel pump filter. Mine had a wad of tank plastic shavings restricting fuel flow.


5/2/2017 10:52 AM
Edited Date/Time: 5/2/2017 10:52 AM

Im not sure how molested this bike is, but i had a prob like this on my kx450 when i first got it. Beat my head for 2 months and found out the previous owner put the tip over sensor in upside down. The bike will run for 3 seconds and die. Every time. The sensor could be bad as well.


2009 Kawasaki KX450F
2009 Kawasaki KX250F
2002 Suzuki GSXR 600

5/2/2017 11:20 AM

Spark plug cap not on tight?


5/2/2017 5:27 PM

Sounds like a tip over sensor issue