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Question Posted By: ringo on 5-15-2009

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Make of Bike: Harley
Model of Bike sportster
Year of Bike 1988
Engine Size 1200
Other info on Bike
What's your question? engine is to rich, after a ride the plugs get sooty
Details: is there a upgrade for the factory carb to make this problem go away.

Post an answer

Answers:

  1. Running sooty at the plugs is not always a carburetor problem. If that carburetor has been running good for the last 21 years...it's more than likely your problem may lie somewhere else. Not sure whether your carburetor is a CV or a butterfly Keihin. Catch me up...and anything else you've done to your ride just before you noticed this.

    By: 47Knuckle-Dragger on: 5-16-2009



  2. Check ignition timing. Check for weak spark from ignition coil. Does it blow a lot of black smoke from the tailpipe at idle? If so, you may have a carb problem. If not, probably ignition related. Is there any oily residue on the plugs? If so, check compression. By: woodsman416 on: 5-21-2009



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