2001 kx125 wont kick start only pop starts - Kawasaki Forum :: KawasakiWorld.com
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post #1 of 3 Old 02-03-2013, 03:28 PM Thread Starter
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2001 kx125 wont kick start only pop starts

owned this bike for about a year. blew this bike up at the track. then rebuilt it cylinder looked ok. has good compression cleaned the carb 3 times. installed different boyesen reeds.
i need to pop start the bike for it to run. when it runs it runs great, no mis good power idles good. then ill turn it off and if i wait 30 seconds i cant kick start it.
some times if i let it sit over night i can kick start it and it starts on the 2nd kick but then i cant kick start it again. i have not adjusted any air screws or changed jets. the bike ran great for the previous 5 months.

new plug, tried remixing new fuel after i drained the existing fuel. cleaned carb 3 times.
when i bought the bike it was summer. then i added a pro circuit pipe and never jetted it. now thats its cold i wonder if the weather may be a factor.
help cause ive been at this for weeks
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post #2 of 3 Old 07-10-2014, 06:35 PM
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bad starting

I had a '89 CR250 Honda that was exactly the same. Turned out that the magneto system weakens over the decades which makes it hard for it to spark at such a slow engine rotation as is had by kicking it over.
But yours may be something else. I would pull the magneto and make sure all the stator coil ground connections are good. That can also cause a weak spark. Once it is running and you warm it up good then see if it idles faster by putting the choke half way on. If so then you need to richen the idle mixture.
Make sure your spark gap is set correctly as too big a gap requires more voltage to cause a spark.
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post #3 of 3 Old 07-10-2014, 07:14 PM
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Your idle circuit is improperly metered. That's why it starts well cold but not hot.

The hot magneto fault has merit but manifests as a good running bike that suddenly falls flat on its face when hot.

Last edited by hagrid; 07-10-2014 at 07:16 PM.
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