Question about 2005 Harley Davidson FXSTI Softail Standard

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99 fatboy has no power

99 fatboy with evo engine (carb not fuel injected) has no power when given gas. It is gutless! It runs a bit hot, luggs in first gear, and often backfires when starting it after I have been on a ride. Often hard to get in neuteral when cold and have to crank over with clutch in in order to get it to go in neuteral. Even when in neutural I hear a rubbing noise on wheel. Don't believe that has anything to do with lack of power though. Any thoughts? Except for adding a cam, engine is stock wwith Vans & Hines exhaust.

Posted by Anonymous on

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  • Harley Davidson Expert
  • 391 Answers

If aftermarket pipes are installed you MUST rejet the carburetor.

Posted on Apr 17, 2015

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  • Harley Davidson Master
  • 40,013 Answers

Hi Anonymous, you have all the classic symptoms of retarded timing, bad intake seals, and incorrect clutch adjustment, or wrong type of primary oil, or contaminated and or warped clutch plates. Good luck

Posted on Apr 17, 2015

6 Suggested Answers

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Posted on Jan 02, 2017

Mitchy123
  • 216 Answers

SOURCE: Road King Motorcycle clutch

Theres 2 clutch adjustments you can do - one is on the cable, under the boot, the other is at the clutch hub, under the derby cover in the primary. That should take care of the whine and your problem finding neutral. If you get some teflon spray and shoot it generously down the inside of your cable, you are gonna be surprized at how easy it'll pull

Posted on Mar 10, 2009

joecoolvette
  • 5660 Answers

SOURCE: when riding 2005 fuel injected harley road king,

Sounds like the intake manifold is leaking. The area where the leak usually happens, are those two rubber sleeves that go from the heads, (Cylinder heads) to the intake. Sometimes the clamp/s loosen up. Sometimes these rubber sleeves deteriorate, and cracks form.

This makes the engine backfire, pop, and idle fast.

The added air at the wrong time cause a backfire, when you let off the throttle. The added air causes the engine to pop, because the exhaust valve has sucked up some cold air.
The engine idles fast, because more air is being introduced, and not metered by the injection system.

(The exhaust valve thing. Exhaust valves are supposed to open, and let exhaust out right? Well there is a thing called Valve Overlap.
The Exhaust valve hasn't closed all the way yet, and the Intake valve is opening.
The 4 stroke engine, (Of which a Harley is), has these four strokes.
1.Intake Stroke. Fuel/air is sucked in.
2.Compression Stroke. The piston comes up and squeezes the fuel/air mixture.
3.Combustion Stroke. The spark plug lights the fuel/air mixture off.
4.Exhaust Stroke. The spent gases are expelled out.

Your Road King has one camshaft. There are four cam lobes on it.
Intake, Exhaust, Intake, Exhaust.

If you had the camshaft in your hand, and had the gear end facing you, look down the camshaft. You will see those egg shaped cam lobes. You will notice that No.1 cylinder Intake lobe is facing to the left.
No.1 Exhaust is facing to the right.

If you put a degree wheel on the gear end of the camshaft, and had the No.1 Exhaust lobe ramp nose facing straight up, you would see that it's about 110 degrees, before the Intake lobe ramp at .050 lift, comes into play. (The roller, of your roller lifter has raised the Exhaust valve up .050 inch) There is about 55 degrees before the Exhaust valve hasn't quite shut.
This is okay for normal running. Introduce a vacuum leak, and the surge of extra cold air, makes it pop.

Solution? I suggest checking to see if the clamps on those rubber sleeves are loose. You can also spray WD-40 towards the ends of each rubber sleeve, when the engine is idling, and see if it speeds up. Means, one or more, of those rubber sleeves has deteriorated.

Posted on Apr 25, 2009

  • 202 Answers

SOURCE: Bike is backfiring through carb.

do u have the correct spark plug the one recommended by the manufacturer

Posted on Aug 02, 2009

  • 29 Answers

SOURCE: Backfire through the intake at cruising speed,

Intake:
Lean, or spark control problem, valve problem, bad fuel, plugged carburetor.

Exhaust:
excessively lean or rich with exhaust leak, valve problem, spark control problem.



Posted on Sep 28, 2009

  • 11 Answers

SOURCE: I have a 2003 Heritage Softail Classic started then died

Fuel clog in carb or injector, or the magnetic pick up for the electronic ignition.....the spark plugs need to be checked also....lots of variables, but thats a start

Posted on Oct 01, 2009

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