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Discussion Starter · #1 ·
Please help!! I have a 86 trx 250 "utility style" that runs rough at really low speed, but runs excellent when accelerating. Also the spark plug gets a coating of what looks like dry black carbon dust, and can get hard to start if not cleaned occasionally. It can be removed very easily with a soft brush. Has anyone else come across this problem? Any help would be greatly appreciated, Eric
 

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Welcome to the forums. It sounds like your ready for a good carb cleaning and rebuild kit. The slow jet is partailly stopped up causing your quad to run riche than normal.
 

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Welcome to the forums. I agree with Moose. The carb needs cleaned.
 
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