Maintenance & Technical > KX500 Original

500 Jetting Questions [Posted for bubbalunatic259]

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Paul:
Posted for Bubbalunatic259

I have a 1994 KX 500, that I love, however it fouls spark plugs on a regular basis. I have leaned the jetting way out. I live in El Paso TX where the altitude is about 3000ft to 4000ft above sea level. I am currently running a 162 main, 55 pilot, and a NM82 needle on the second clip position. I run at 40:1 premix ratio. I have a V-Force Reed Cage, and a FMF Gnarly Pipe. Can someone out there help me? I have a fresh top end, could it possibly be ignition timing? Thanx!

doordie:
Paul,

Have you check the coil is grounded properly,no paint or stuff between?
When did you change the "sparkplugcaps" ?
Killer button?

Just some thoughts. :wink:

//doordie

Paul:
It's not my question doordie :lol:

I posted it for bubbalunatic259 ;)
 

--- Quote from: doordie ---Paul,

Have you check the coil is grounded properly,no paint or stuff between?
When did you change the "sparkplugcaps" ?
Killer button?

Just some thoughts. :wink:

//doordie
--- End quote ---

mikesmith:
What plugs in it?And are you replacing it or just cleaning the old one?Hows the bike run,and what kind of riding do you do with it?

KXcam22:
Mike,
  That is a good point. I have found that cleaned previously-fouled plugs foul again quite easily, to the point where I just throw them away.  Not sure why, voodoo or something.  His jetting is quite close. Mine has never fouled a plug in it's like. If nothing else works, try a BPR8ES.  The nose sticks out a bit further (the P part) so they run cleaner.  Doordie has a good suggestion too about the electrics, although I would think it would start poorly. Cam.

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