Question about 2000 Harley Davidson XL 1200 C Sportster Custom

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Haveing (carb farts)spitting and backfire from carburetor on 2001 1200 harley sporster.what is causing it and what can i do?

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1. First check you carburetor manifolds for intake leak warm the engine up and spray WD40 all around the where the manifold connects to the heads if the rpms change when you do thins you have leak replace the gaskets.
2. Your carburetor may need cleaning due to a blocked or partially blocked low speed circuit.

Posted on Jun 04, 2010

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One other thought, you could also have bad spark plug caps or even a partially fouled plug. If you have fancy flashing plug caps they can cause poor spark. At any rate this would be inexpensive and easy thing to try. If new plugs do not help, carry the old ones as spares in your tool kit.

Posted on Jun 17, 2010

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Chances are you pilot jet is too small and your idle mixture is too lean. some adjustment can be made via the mixture screw.

Posted on Aug 23, 2010

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If you have changed pipes or any mods it will be a main jet needs next size easy to do.lookup s&s carby adjustments this explains the best way to test jets while rideing.

Posted on Jun 25, 2010

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Make sure your wires are on right. Backfiring through the carburetor indicated that the plug is firing at the wrong time.

Posted on Jun 19, 2010

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Posted on Jan 02, 2017

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SOURCE: oil blow out the breather

An overfull oil tank will do it. Even if not overfull just about all harley's will blow oil out the air filter. Unless there is a bunch of oil coming out, it's not a problem What I've found is that the air filter eventually gets saturated and then starts to leak through. The level in the oil tank doesn't seem to matter. If you change the air filter the problem goes away, until the new one gets saturated and then it starts all over again. My plan is to get a K&N air filter, which you can clean yourself and save having to buy a new air filter every 4,000 miles or so.

Posted on Nov 20, 2008

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SOURCE: oil blow out the breather

This is a common problem on all sportsters, they have an oil blow by that dumps it into the air filter. I have found that if I run about a half quart low the problem goes away.

Posted on Mar 04, 2009

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SOURCE: backfires thru carb.spits and hesitates

have you add anything or adjusted anything? spray some soapy water at the intake seals while the bike is running (idling) if the idle changes you have intake seal leak and if you have added an new air filter other than stock you may be running to lean and need to rejet

Posted on Mar 19, 2010

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