Maintenance & Technical > KX500 Original

stalling problem

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87500rider:
i have a 1986 kx500...i start it and it idles fine...then wen i ride it it runs fine for about 5 minutes then bogs and shut off as im riding...has anyone else had this problem...any tips on how to fix it?

Friar-Tuck:
 Where do we start....    What have you tried so far, and when did this start.  Did the condition start gradually or just one day it started and continues .
  I'm pretty lazy, :-o so the easy/simple things get tried first... Fresh fuel,plug,airfilter (clean),etc. 
 
 Fuel or Ignition   "bogs and shut off as I'm riding..."   first thought is fuel... (starts & Idles)
 
 If the tank vent is not working properly, it will create a vacuum and not let fuel in your carb. (same for carb vents & overflow)
 If the in-tank filter (fuel valve inlet pipe) is plugged/restricted it will restrict fuel flow, or the valve itself has become corroded or sediment has found its way in the valve.
 If the float is not working properly or set too low you can run carb bowl dry, or the viton tip of the needle is boogered (possibly with age or meth/alcohol fuel content)
 How does the fuel line look, is it getting plugged,restricted..

If the coil or cdi has a bad wire or winding, a few moments running may cause enough heat to open the circuit, along the same lines, Then again the plug may be bad, or the plug cap or the wire.

There is some troubleshooting stuff in the gallery
 Pg.1)  http://www.kxriders.com/coppermine/displayimage.php?album=lastup&cat=1&pos=30
 Pg.2)  http://www.kxriders.com/coppermine/displayimage.php?album=lastup&cat=1&pos=21
 Pg.3)  http://www.kxriders.com/coppermine/displayimage.php?album=lastup&cat=1&pos=22
 Pg.4)  http://www.kxriders.com/coppermine/displayimage.php?album=lastup&cat=1&pos=23
    Etc...
  Let us know what you tried and how it went.
  Tuck\o/

87500rider:
i put fresh gas in it and it ran better and i cleaned the carb....i will chech the tank filter tommorow and let u know how it goes...thanks

Friar-Tuck:
 I'm sorry I can't give you anything more definitive '87,
  Trouble shooting is more or less about patience an working through the systems one at a time in some kind of order.
 Verifying that fuel is available at the carb is where I would start.

  Maybe drain the tank partially by the fuel valve. that would rule out the the tank,vent and valve.
  Tuck\o/   

87500rider:
i fooled arouned with it today and i dont think it has anything to do with the fuel i think its electrical....cause i let it idle and all of a sudden it shut off like i was hitting the kill switch....any ideas?

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