Plugs filing out

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May 21, 2012, 07:30:33 pm

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[RL Sypolt]

 ???I am having trouble with my 1981 Kawasaki kz 440 filing out plugs, when the plugs are removed they are covered with a black soot. We have replaced the air filters to no avail. Any one have any amswers on what could be causing this? Any help would be greatly appreciated, my poor husband is at his wits end with it.

[motomech]

Sorry for the long delay, hope your husband got this issue figured out.

You didn't supply enough information on the bike as far as modifications go but if the plugs are fouling out it is caused by too much fuel getting into the combustion chamber. He will need to remove the carburetors and either clean the carbs and then readjust the float levels.

Too much fuel in the float bowl will cause a rich condition.
Good luck

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