Maintenance & Technical > KX500 Original

how to keep bike from flooding

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robert40215:
I was using ngk b9eg spark plugs for my 1986 kx 500. So I ordered NGK BR8EIX Iridium spark plugs so I want to know if these new spark plugs work better.

alan:
Generally speaking the lower the number the hotter the plug. So assuming the carb was jetted properly and the plug was black with carbon and oil you could go to a hotter plug to avoid fowling out.

alan:
One other thing I forgot to ask, did you just get this bike? What altitude are you at and where did the bike come from?

BigGreenMachine:
Sounds like the float/needle and seat are worn and letting fuel by.

Also, if your bike is fouling plugs and the jetting is stock chances are there is a bigger underlying problem like bad crank seals letting excess oil in the chamber, low compression due to worn rings/wall, etc..

A hotter plug may fix your fouling plugs issue but sooner or later the underlying problem will come to the surface in a big way.

robert40215:
I got the bike from a friend it was just sitting in the backyard for a year or two. I am in Kentucky it come from the same state. I know the bike runs since it worked the other day. I am going to try some higher grade of fuel after I receive the spark plugs I ordered. I had to much oil in the gas since it was smoking pretty bad when it was running. When I get it started I am going to let it run longer to heat the engine up before I turn it off. Oh I got the bike for nothing so any parts I put into it is fine with me since I didn't pay for the bike. A guy at a bike shop said he would look at the bike for like $60.00 an hour. But since it started up the other day I think there is nothing electrical wrong with it. It is just getting it to fire up everytime I kick it without hurting my foot. But If I put the choke down instead of up it will want to start but it would backfire a couple of times then start.

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