Maintenance & Technical > KX250 / KX125

Cold start problem.

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Hillclimb#42:
 Sometimes, I think the fuel in the bowl really loads up the cylinder. Push it around, load it, unload it, wash it, it all makes the floats bob around then releases fuel in the cylinder don't it? I think thats kinda helpful, most of the time, because the first second or two of running you have some extra lube for the cylinder, due to the evaporated fuel. Being super cold, its not surprising to have some trouble. Anywhere to work on it after warming it up? I would say, leave the starter fluid alone. Fouled plug, and maybe fuel getting there issue. Lean it over, before trying to start. You should see gas pour out of the vent. Don't need to kick until worn-out. If it doesn't start in its normal time, turn off the choke. If that doesn't work ,wfo. It'll start probably, but you are gonna be lean, guaranteed. At least fatten up the mixture screw, and listen for lean-out.

Uzi9mm:
Jo, what is your start procedure?  Choke?  Priming kicks etc...  For my 500, I turn on the gas, choke it, and kick.  Usually starts 1st or 2nd kick cold. 

Jopiz:
Hey!

I took the carb off and jets were firmly in place. Float was ok and the carb should be OK! I checked float height and it seemed to be right. The oil im using should work in these temperatures fine. Im using good quality castrol oils. Im going to check reeds.

My start procedure usually is: Choke on, about 1/2 gas, kick, choke off, and another kick. It normally starts 1st or 2nd kick.
I moved my bike to a warm carage. I disassembled the whole bike and noticed something strange in the spark plug cap. It was loose and it could have caused the problem. Lets see does it run when i assembly my bike!  :mrgreen:

Thanks for your help!

-J

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