99KX125 Fouling Plugs,,,PLEASE HELP

That bikes jetting was horrible when I had it. I don't remember the specifics, but I ended up with a 155 main and a leaner pilot and the clip in the top position and it still spooged.

Erik
2002 cr250

I have a 99 KX and it has never fouled a plug. The spooge on my bike is very little... practically zero.

I've tried lots of jetting specs, and these are the best results I've come up with. I'm back to all the stock settings except I switched to a 152 Main. In case you've switched jets and needle position, this is what they are....

45 Pilot (stock)
152 Main (I think 158 was stock?)
Stock needle 3rd clip (all stock)
55 Power jet (stock)
stock plug (br9ev-x, br9ev is fine too)


I have a PC pipe and exhaust. I live in NJ.

Oh yeah... I also let my girlfriend ride it on a trail or two for about 30 minutes. 1st and 2nd gear only and definately less than half throttle the whole time. Still never fouled it.