Question about 2006 Harley Davidson FLHRI Road King

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2006 Road king. Changed oil. After warm up the oil light comes on at idle. Goes out running down the road but comes back on at idle. What should oil pressure becold and hot ?

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  • Harley Davidson Master
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Hi Anonymous, if your oil pressure gauge is acting eratic or your oil pressure light stays on you could have a faulty sending unit, gauge or air in the system or a restricted oil filter, start by checking oil level in tank and make sure it is between the add and full mark. With engine at normal operating temperature 180-230 degrees and the use of a 10 micron synthetic media oil filter, oil pressure will be 30-38 psi at 2,000 RPM and 3-5 psi. at idle. The oil pressure light is designed to come on at 2 psi. or less. To accurately test oil pressure remove oil pressure sending unit and install known good oil pressure gauge that reads 0-50, there might possibly be some plumbing required for hard to access points. If you are out in the middle of nowhere and there is no cell phone service and your oil pressure gauge isn't working and your oil pressure light is burned out, despair not, you still have one last line of defense left HYDRAULIC LIFTERS, as long as those tireless workers are quiet, you have oil pressure, maybe not much, but enough to get you down the road at a slow to moderate speed using the least amount of RPMS as necessary. Good luck and have nice day.

Posted on Jun 24, 2015

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Posted on Jan 02, 2017

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  • 148 Answers

SOURCE: where is the oil dipstick on an 03 road king

The oil dipstick is located on the right side of bike almost directly under the football cover for the air cleaner. It's a round knob that pulls directly out (Kind of wiggle as you pull on it). Just check like a regular car dipstick pull, wipe and reinsert and then look at dipstick.

Posted on Jul 07, 2009

  • 1 Answer

SOURCE: Oil change directions, 2003 Road King

The drain plug is on the left side of the oil reservoir pointing towards the front of the bike. The motor should be warm when you dump the oil and the o-ring should be replaced as an extra precaution (don't want to waste that new oil if you have a drip). When replacing the oil filter use a piece of tin foil to divert the oil to your waste pan.

Posted on Jul 23, 2009

Mr BrokRench
  • 1623 Answers

SOURCE: valve noise 2006 road king

Hello redevil67...This is normal for the HD engine, it going to have valve train, top end noise at some point, some as early as 2000 miles. If you take it to the dealer they will try to sell you on worn tappets...key word here SELL..I've seen this many times, dealer replaces componets, 2000 miles later the noise returns.
These are hydraulic valves and as you probably know they operate at zero lash. Personaly, i feel that the problem is that the cams are not hardened properly or machined incorrectly.. When the leading edge of the cam lobes wear to a strange profile it tends to snap the lifter up in the lifter bore. This causes the rest of the valve train to rattle. You hear the noise on top but the culprit makin it, is the cams..Many chose to go with an aftermarket cam, such as an andrews...Another suggestion, is to switch oils. Don't know what you are useing now, but i'm not a fan of dino oil. As the temperature builds the more an oil is stressed. Lucas full synthetic 20w-50 or Mobil1 15w-50 are both excellent for anti-wear and long term protection.
I hope this helps, please rate me a fixya and good luck with your bike.

Posted on Jul 30, 2009

wd4ity
  • 4565 Answers

SOURCE: How to change oil in 2006 HD road king

The oil tank in a Road King is on the bottom of the transmission. If you look under the transmission, you will see two drain plugs. One for the engine oil and one for the transmission. I THINK the plug closest to the left side of the bike is the engine oil. I say "I think" because the latest model that I have personally changed the oil in is a 2000 model. Drain the oil, change the filter, add new oil. If you accidently drain the transmission (check the engine oil dipstick, if it still shows oil in the tank, you drained the wrong one), the transmission takes 20-24 ounces of Harley Syn3 oil. Best to refer to an owner's manual or go to your local dealer and ask the question.

Posted on Sep 25, 2009

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Hi Anonymous, if your oil pressure gauge is acting eratic or your oil pressure light stays on you could have a faulty sending unit, gauge or air in the system or a restricted oil filter, start by checking oil level in tank and make sure it is between the add and full mark. With engine at normal operating temperature 180-230 degrees and the use of a 10 micron synthetic media oil filter, oil pressure will be 30-38 psi at 2,000 RPM and 3-5 psi. at idle. The oil pressure light is designed to come on at 2 psi. or less. To accurately test oil pressure remove oil pressure sending unit and install known good oil pressure gauge that reads 0-50, there might possibly be some plumbing required for hard to access points. If you are out in the middle of nowhere and there is no cell phone service and your oil pressure gauge isn't working and your oil pressure light is burned out, despair not, you still have one last line of defense left HYDRAULIC LIFTERS, as long as those tireless workers are quiet, you have oil pressure, maybe not much, but enough to get you down the road at a slow to moderate speed using the least amount of RPMS as necessary. Good luck and have nice day.

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2003 HD Road King - starts fine, idle normal. Once it is warm, idles at 2000 rpm. Does not come back down, even after riding for an hour or two. Only idles normal when cold. Help??


If you bike is equipped with a carburetor, the idle stop screw is located at the top of the carb on the right side. Counterclockwise turn slows the idle speed.

If you bike is fuel injected, a dealer or shop will have to set the idle speed electronically.

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2006 FLHRI Road King


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When you check your oil is the bike warm or cold, and is it leaning or do you stand it upright?

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