Question about Motorcycles

2 Answers

I have a 2000 Harley road king. It has been running beautifully. Yesterday after riding for 45 minutes we stopped for short visit. Upon trying to start up, while cranking, the bike "popped" or backfired if you will and now will not start. I fire to both pluggs. Any suggestions???

Posted by on

Ad

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 3 Answers

Check coil to make sure someone hasn't swapped position of plug wires

Posted on May 11, 2014

Testimonial: "I got in there to check out this suggestion and after further investigation I found that the backfire pressure had blown my carburetor off of the intake. I put it back together and she purrs like a kitten. :)"

Ad
  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Motorcycles Master
  • 3,506 Answers

In a case where the engine did run apparently well and then stopped and will not start again but will backfire loudly you can also have weak plugs that won't fire properly any more under compression pressure but will fire (and therefore backfire without starting) on the exhaust stroke as the unburned gases that are in the unpressurized cylinder will fire on the exhaust stroke in wasted spark ignition systems.

Posted on Sep 08, 2014

Ad

6 Suggested Answers

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

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

v2iper
  • 150 Answers

SOURCE: 1999 road king wont start

Its your fuel pump if you can't hear it. And its inside your tank. Not a hard fix if you have a book that tells you how to remove it. Alot of procedures to follow to get it right. And yes it does work off a relay.

Posted on Jun 14, 2009

v2iper
  • 150 Answers

SOURCE: what size spark plug for a 2000 harley davidson road king carbed,

Your Twin Cam plug should be a 6R 12 Harley Plug. Often times the back fire is just the nature of the beast depending on what type of pipes you are running. Harleys do run lean, its an EPA thing thtas why they choke them down from the factory. Since you have a carb you could have an intake leak around the Intake. Also Under the carb is an adjustment screw. Harley plugs it up so people don't play with it. You have to just drill out the plug this will set your air fuel. Whenever I take a carb off I drill out that plug. Heat your bike up operating temp and ear tune that screw. Only other way is with air fuel analizer or a dyno. good luck.also that backfire is caused by fuel hitting your exhaust when you let off just to let you know.

Posted on Jun 15, 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

wd4ity
  • 4565 Answers

SOURCE: oil change procedure 2000 road king

the oil tank is on the bottom of the transmission in your RK. There are two drain plugs. The plug towards the front left of the pan is the oil drain plug. The other one is for the transmission.

Drain the oil, replace the filter, refill with three quarts of oil and you're ready to go. The dipstick has two marks on it. The upper mark is "FULL HOT", and the lower mark is "FULL COLD". Do not overfill.

Don't forget to service the transmission and the primary at their recommended intervals.

Good Luck
steve

Posted on Jul 26, 2010

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Harley problems


bad fuel, vapor lock,spark plugs?

May 22, 2014 | 2005 Harley Davidson FLHRI Road King

1 Answer

What could promlem be


o
un do panel check electrical conection on back it just plugs in

May 22, 2014 | 2005 Harley Davidson FLHRS - FLHRSI Road...

1 Answer

Harley problems


the brake is damaged or the engine is old

May 22, 2014 | 2003 Harley Davidson FLHR Road king

1 Answer

What does the do1clr cal3 stand for on a 2000 harley road king


Hi Tjcturner, for more information about your question please visit the websites below. Good luck and have nice day.
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Jul 18, 2012 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

2000 flhri road king factory colors


Hi Anonymous, for more information about your question please visit the websites below. Good luck and have nice day.
2000 Harley Davidson FLHR FLHRI Road King

Jun 18, 2012 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

2000 ROAD KING TROUBLE CODE 85EE


Hi Joe, for more information about your question please visit the websites below. Good luck and have nice day.
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Jun 01, 2012 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

I have a flashing oil light while the engine is running on my 2000 Road king


d01 Speed sensor power output shorted low - Red wire
d02 Speed sensor power output shorted high or open - Red wire

Test your oil pressure sending unit.

May 22, 2012 | 2000 Harley Davidson FLHRCI Road King...

1 Answer

Warning code


Hi Jbird91, for more information about your question please visit the websites below. Good luck and have nice day.
Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...

Jul 10, 2010 | 2000 Harley Davidson FLHR-FLHRI Road king

1 Answer

The red key light comes on the dash while riding and stays on for a short while after turning the bike off.


Hi Anonymous, you may need an alarm reset, for more information about your question please visit the websites below. Good luck and have nice day.
Set Change Override Transport Harley Security Alarm PIN Code No Key Fob...

May 12, 2010 | 2000 Harley Davidson FLHR-FLHRI Road king

3 Answers

2001 Road King Classic EFI model sputters on hot days


Oil has nothing to do with it. That guy must sell ams oil or something..anyway its your temp sensor on your bike. change it out. You guys running injected correct?

May 18, 2009 | 2000 Harley Davidson FLHR-FLHRI Road king

Not finding what you are looking for?
Motorcycles Logo

Related Topics:

154 people viewed this question

Ask a Question

Usually answered in minutes!

Top Motorcycles Experts

Arnie Burke
Arnie Burke

Level 3 Expert

4536 Answers

yadayada
yadayada

Level 3 Expert

76846 Answers

kakima

Level 3 Expert

102366 Answers

Are you a Motorcycle Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...