Question about 2005 Harley Davidson XL 1200 C Sportster Custom

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On the later model bikes that have carburetors, the petcock is vacuum operated. You must turn the engine over until the float bowl fills up enough for the engine to run. Some petcocks have a "prime" position on them but I don't think the Harley does. That's one reason I suggest that owners go to a high quality manually operated petcock.

Now, this brings up the question,"are you sure you ran out of gas" or did your vacuum operated petcock go bad on you? This is what they do. I've seen guys with nearly a whole tank of fuel "out of gas" because none was going into the carburetor. The vacuum operated petcocks are notorious for this. One one occasion, I saw one leaking air so badly that the bike nearly would not run. They are source of trouble that will show up at the most inopertune time. My advice, change it and buy a Pingel petcock. First class part and they ain't cheap but worth every penny. Good Luck, Steve

Posted on Apr 25, 2010


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Posted on Jan 02, 2017


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