Question about Harley Davidson Harley-Davidson Motorcycle Desktop Telephone

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Have a2008 fatboy put on a set of big radius when letting go of thrortle it pops what causes it to do that

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Your fuel mixture must be remapped with all pipe changes you can pay the harley shop around $200 for them to download the proper fuel mapping or buy the vance and hines fuel pak and download settings for your application note fuelpak setting downloads not always accurate harley does downloads on dyno the only way to insure accuracy

Posted on Dec 30, 2009

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Decel pop is caused by a lot of things! if you have big pipes; ie:drag you need baffles to tune the exhaust wave; theoretically upon decel instead of exhausting you are actually allowing reversion- which allows exhaust to actually renter your engine and try to get compressed again; very bad for performance, etc big pipes are cool but need proper baffling and tunage to be useful; may be too lean possible fix w/ supertuner/ dyno runs; I like "lollipop" baffles you can make for under 5 bucks and tune as you need; thats what I run on my 95HP sporty; Have Rinehart true duals on my Road King and via ecm tuning you can really dial it in. F/I is great but you need to "pay to play" no quick fixes like in the carb days; really need a dyno or some sort of computer tuning capability; I recommend Super Tuner rather than the piggyback setups; more expensive at first but wont fry your ecm either. A good dealership will be able to tune it right the first time in under an hour...sorry for the lenghly reply but I see this question all the time...T

Posted on Jul 07, 2009

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Hello, My 2011 fatboy lo runs very hot. I have Vance and Hines big radius and screamin eagle stage one kit. It runs hot but it runs awsome. i wanted to put an oil cooler on the bike but was told to leave...


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