Question about Harley Davidson FLTR Road Glide Motorcycles

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Harley flh my 96 roadking ran great till fuel started leaking out of small hose bottem rear of carb now fuel just flows out of front

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  • Harley Davidson Master
  • 3,506 Answers

It sounds like the needle and seat is stuck

Posted on Aug 31, 2014


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Posted on Jan 02, 2017

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SOURCE: Rear Carb leaks fuel out of overflow

Hole in the float. It fills with gas, sinks and fails to stop the fuel flow

Posted on Apr 25, 2009

SOURCE: Fuel leak

The carb/s are flooding , you will have to check the float pin and the float, a good clean with compressed air should do the job, check too the fuel line and the fuel filter.
Hope this helps!

Posted on May 24, 2009

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SOURCE: Air box and crank case fuel flooding problem

Well there only one way the fuel can get into the crankcase and that's from the fuel tank. The petcock must be draining and the float needles are not stopping the fuel flow. Do you have a prime position on the petcock? If so do not run the bike in the position. Try topping the tank off with gas and letting it sit for a while and see is the gas has gone down and then check the crankcase and see if there's fuel in it again. i still say its got to be your petcock.

Posted on Sep 29, 2009

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SOURCE: FJ1100 is running a little bit rough and fuel is

It looks as if you'll need to rebuild your carbs. As for No. 2 cylinder it would appear the float is stuck down not shutting off the fuel supply. This may be a mechanical issue with the carb or simply some build up not allowing the valve to shut off completely. I'd pick-up a rebuild kit, remove the carbs, tear them down and clean them up.
I hope this may have helped
PS: Great bike!

Posted on Oct 02, 2009

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2000 Harley Davidson electra glide FLH w/efi The fuel in the right tank is not transfering to the left where the guage is and the idiot fuel light comes on so I fuel it up and it take 2 gallon.I put a new...

The vent between the tanks is located under the tank panel. The fuel vent is in the right side gas cap. Did you check to make sure fuel was flowing out of the right tank while you had the crossover hose off?

Good Luck

Jun 04, 2011 | 2000 Harley Davidson FLHT Electra Glide...

1 Answer

2005 sportster 1200 carb stops after running awhile won't start until sits for bit seems like front cyl miss firing before stopping

Sounds like the engine is running out of fuel. There could be two reasons for this. One, the vent in the gas cap could be stopped up. Try loosening the cap, but don't take it completely off unless you want a lap full of gasoline, and take gentle ride. Do this with a half tank or less of fuel for the same reason I just mentioned. See if it still does it. Secondly, in 1996, Harley started putting vacuum operated petcocks on the bikes. These do give problems. They have a diaphragm that is opened by engine vacuum allowing the fuel to flow to the carb. If the diaphragm gets a hole in it, it will not allow fuel to the carb. To repair this, you must take the petcock out of the tank. Disconnect the fuel and vacuum hoses. Loosen the large nut until fuel starts to flow out. Catch the fuel with a large funnel and an empty gas can. Remove the petcock and take the four small bolts out that hold the square plate on the rear of the petcock. Carefully remove the plate observing how the needle, spring, and diaphragm are in there. Hold the diaphragm up to the light and gently stretch it looking for holes. If you find a hole, replace the diaphragm. While you have the petcock out, clean the fuel screen.

Good Luck

May 29, 2011 | Harley Davidson Burgman 125 G Motorcycles

1 Answer

I ran out of gas, now it won't start. what do i do?

Okay....I think your bike may have a vacuum operated fuel petcock.....which is the fuel valve on the bottom of the tank. It shuts the fuel off automatically when the engine stops and the hose from the intake to the side of the petcock loses vacuum.
So when you restart the bike the petcock is closed till the engine starts...which is okay because there is a small amount of fuel in the carb.........until you run out of gas....then the engine quits and the carb is empty.
To handle this situation, typically there is a prime position on the petcock that allows flow without vacuum to "prime" the empty carb......usually marked as PRI on the petcock,
So rotate the lever on the petcocck to prime....wait a couple minutes....get the bike started and set the petcock back to the normal setting....don't leave it on PRIME as fuel may flow overflowing the carb.

Apr 04, 2011 | 2007 Yamaha XT 125 X

1 Answer

Changed the ignition on 1996 sportster xl1200c now it dies out when i start of in first and in second like its not getting any gas

Well, pull the fuel line loose from the carb, put it in a catch can, and spin the engine. The '96 and later Harley's have a vacuum operated petcock if it is still stock. It gets vacuum from the intake maniold or backside of the carb through a small vacuum line. The hose plugs onto the backside of the petcock. If you're not getting any vacuum or the diaphgram in the petcock is damaged, you won't get any fuel to the carb.

Also, try loosening your fuel cap. Don't take it completely off just good and loose. If the fuel tank vent in the cap is plugged, a vacuum will build up in the fuel tank quickly and stop the flow of fuel.

Are you sure you have your ignition system timed and wired correctly?


Mar 27, 2011 | 2000 Harley Davidson XL 1200 S Sportster...

1 Answer

When i start the bike cold or hot i have black smoke from the exhaust pipes..choke on or off and cant get bike to idle..i turn off the petcock and after a few seconds the idle starts to come back to...

Black smoke indicates that your mixture is way too rich. Now, you didn't say what carb you're running, stock or aftermarket. But, what it sounds like to me is the needle and seat in the carb is leaking fuel and overfilling the float bowl. When you're running down the road, you'll using enough fuel so that the float bowl does not overfill. When idling, you don't use as much fuel, the bowl overfills, and fuel flows into the carb creating a very rich mixture. Is you overflow hose that connects to the bottom of the float bowl connected, clear and open? If so, turn the petcock on without the engine running. If the overflow is clear and the needle valve is leaking, you should see fuel start to flow out of the overflow hose. This is very important that it do this. If the overflow hose is blocked and you forget to turn your petcock off, you could wind up with a couple of gallons of fuel in your engine. It will leak out of the float bowl, into the carb past the intake valves, past the rings and into the engine. I've also seen it get into the primary drive case as well. I'd put a new needle in the carb and check the float setting according to the book. it's sets with the carb on an angle if the carb is the original Keihin CV.

Good Luck

Jan 29, 2011 | 2003 Harley Davidson FLSTFI Fat Boy

2 Answers


Try and get the carbs balanced .You may have one in need of adjusting .

Mar 17, 2010 | 2001 Harley Davidson FLHR - FLHRCI Road...

1 Answer

2000 roadking carburated it runs but you have to leave the choke on a little or it will stall.

the fuel mixture valve on the out of adjustment or fouled with laquer. first thing is get a pint of carb cleaner and pour it into a full tank of gas and take your bike for a long ride couple hours at least.. but adjust the valve on the carb first. turn the screw in till real snug, then turn back out exactly 1 and a half turns. doing this will help remove any laquer deposits on the tip of the needle valve that restricts fuel flow and the correct fuel/air mixture. hope this helps you out, and let me know how you do.

Mar 09, 2010 | 2001 Harley Davidson FLHR - FLHRCI Road...

1 Answer

1994 FLHR RoadKing, 1340cc, engine miss

this is going to sound weird but if your bike has a crankshaft location sensor it is a litte one screw held on wired sensor up by your oil filter that connects to your regulator on front of bike it cuts power to your coil and ecm if it cant read right had same problem on my bike ran like a champ after that

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