Question about Harley Davidson FLSTF Fat boy Motorcycles
If it's a carburated engine, check the vacuum operated petcock for full fuel flow. These things are notorious for giving problems. I've replaced mine with a high quality manual operated petcock. Pingle is a good one but pricey.
Remove both hoses, the large one and small one. You'll need a hand operated vacuum pump to apply vacuum to the backside of the petcock. Apply the vacuum and look for full fuel flow from the petcock.
It could also be a bad fuel cap. The vent could be allowing a vacuum to build in the tank as the engine uses the fuel and slowing down the fuel flow. Loosen, but take the cap completely off or you'll be wearing a couple of dollars worth of gasoline, the cap and ride for ways to see if this helps.
Posted on Aug 06, 2010
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Posted on Jan 02, 2017
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