Question about 2004 Harley Davidson XL 883C Sportster Custom

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When my 883 warms up it fouls out the spark plugs, as if it is getting to much gas, when I go to accelorate it backfires and bogs down. At idle it runs fine.

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Is your 883 fouling plugs AS if warms up or AFTER it warms up? The enricher circuit is designed to be extremely rich in order to start a cold engine. If you allow you engine to "warm up" with the enricher on the entire time during warm up, plug fouling is typical. You should use the enricher to start the engine but disengage it as soon as you can keep the engine running with the throttle. Use the enricher just as little as possible.

If your plugs are fouling AFTER warmup and while riding, your carburator is jetted too rich or your air filter is in need of servicing.

Posted on Sep 28, 2009

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