Question about 2001 Harley Davidson FLSTF - FLSTFI Fat Boy

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Power poblem have a 2001 fatboy. put new charged battery in started rode for awhile shut off would not restart.

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Check to see if its charging as you ride,, Keep in mind that Harleys hate start and stops,, once you start them they draw alot of power from the battery,, and should be ridden for a long time to recharge the battery ,, with the post connections hooked up, use a volt meter to check the charging,, it should read between 13-15 volts ,, if not you have a regulator problem

Posted on Aug 02, 2010

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Posted on Jan 02, 2017

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duane_wong
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SOURCE: Put new battery in rode 90 miles shut bike off

bad charging circuit to battery causing low voltage on battery and shut off condition.

Posted on Jul 10, 2010

wd4ity
  • 4565 Answers

SOURCE: bought a new battery rode

To check the output of the charging system, first, you must start with a fully charged battery. Then connect your DVOM (Digital Volt Ohm Meter) across the battery. Red meter lead to the positive post and the black meter lead to the negative post of the battery. Put the meter's function selection switch in DC VOLTS, 25 VOLTS OR GREATER scale. Start the engine and bring it to a high idle. Your meter should read between 14.5 to 15.0 volts.

If not, find where the regulator plugs into the alternator. A Big Twin is in the front of the engine and the Sportster is behind rear cylinder. In the stator side of the plug, there are two metal contacts. This is where you're going to check the voltage output of your stator. Put the meter's function switch in AC VOLTS, 50 VOLT OR GREATER scale. Start the engine and insert either meter lead into one metal contact and the other lead into the other contact. Do not allow the leads to touch each other or the engine case. Bring the engine to a high idle. If you're working on a Big Twin, you should be reading at least 30 volts, a Sportster should read about 25 volts. If you don't read this much, your stator is bad, If you do read this much, it's probably the regulator. But, since you said that you've changed the regulator at least once, I'd guess maybe another problem. Make sure you regulator is grounded to the frame. I always put one of those star type lock washers between the regulator and the frame on both mounting bolts. The regulator must be grounded.

Good Luck
Steve

Posted on Mar 16, 2011

wd4ity
  • 4565 Answers

SOURCE: fatboy only rode twice in 2 yrs won"t idle

It sounds like your slow speed jet in the carb is plugged. When fuel is left in the float bowl and it evaporates, it leave behind a thick gummy residue that will plug the jets. You can try running some fuel injector cleaner mixed with your gasoline but I've not had good luck with it. In order for it to work, it has to flow through the jet but can't because the jet is clogged. I'm afraid that the best cure is a complete disassembly and soak the carb in a professional carburetor cleaning solution. To avoid this problem in the future, shut off the fuel somehow and either drain the carb or run the engine until it quits to empty the float bowl. The petcock on your bike is vacuum operated and I'm not sure if it has an "OFF" position. You may wish to replace the petcock with a manually operated unit and plug the vacuum line that goes to it. This way you can shut your fuel off or turn it on as needed. Pingel makes a very high quality unit but it is kinda pricey. You can get a Harley unit for a pre-1996 model bike as well.

Good Luck
Steve

Posted on Aug 23, 2011

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It is likely that youve popped a fuse
The battery would have to be totalled to behave like that
But it sounds like the battery isnt being charged properly. Make sure the voltage across the batt terminals is at least 13.5v at tickover rising to no more than 15.5v at higher revs
Make sure the battery connections are TIGHT as well
Ride-Safe
Bike-Doc

Please mark this as helpful (if it has been!!)

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