Maintenance & Technical > KX500 Original

suddenly too rich

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matzilla:
ok, my bike was running awesome just the other day with a 62 pilot 2 turns on the air screw 3rd clip on a CEJ needle and 180 main. then i went to ride it the next day and it is so rich all over that it will barely run. i have gone down one jet at a time to a 55 and it is still way to rich on the pilot circuit. loads up bad then clears out with some throttle. it has a fresh B8EG plug and a clean and lightly oiled k/n filter. i used starting fluid spray to check for vacuum leaks, but it is acting more like it isn't getting enough air. i am wondering if i should be looking at my Vforce reeds. any other possibilities? it is only about 10 degrees warmer than when it was running perfect. thanks in advance for your help.

ktmdude:
I know its a long shot but when you cleaned the air filter did you put a rag in the intake to keep out dirt, and leave it in? I did it the other day. I even taught to my self "take the rag out", I was doing two bikes, took out the first one, got distracted and left the 2nd. I remembered about 20min later and went in after it. Its probably not your problem but I figured I'd throw it out there.

matzilla:
no rags. thanks

ktmdude:
Hum... Head scratcher.
Ok I got another thought, maybe the air passages in your carb are clogged with dirt. I would remove the carb. Remove the jets, clean everything real good with carb cleaner and compressed air. Also check to see that your slide is closing all the way. I would install your original jet specs. and see what happens. When the carb is off it couldn't hurt to give the reeds a look. I don't think that's it, but it is right there.

Hillclimb#42:
Check silencer. Any obstruction in there causes power issues quickly. Your main is a 180? I would also clean jets and float bowl to rule that out. You might find something when you're looking in there.

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