Question about 2005 Harley Davidson FLHRS - FLHRSI Road King Custom

1 Answer

Bad gas bike wont run?

Left bike in garage while on extended vacation.when I came bike would not start.Motor turned over.

Posted by Anonymous on

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  • Harley Davidson Master
  • 43,836 Answers

Hi Anonymous, and the usual suspects are:
1. Fuel tank empty
2. Fuel supply valve turned off.
3. Fouled spark plugs.
4. Engine flooded with gasoline as a result of over use of enrichner.
5. Fuel valve or filter clogged.
6. Vacuum hose to automatic fuel supply valve disconnected, leaking, or pinched.
7. Discharged battery, loose or broken battery connections.
8. Loose wire connection at coil, battery or plug between ignition sensor and module.
9. Spark plug cables in bad condition and shorting, spark plug cable connections loose,
or cables connected to wrong cylinders.
10. Ignition timing incorrect due to faulty ignition coil, ignition module, or sensors " Manifold Absolute Pressure" "Camshaft Position Sensor" "Crank Position Sensor" "Brake Apply Sensor
11. Engine lubricant to heavy ( winter operation )
12. Sticking or damaged valves or push rod wrong length.
13. Primary cam sproket spline sheared or missing spacer.
For a primary suspect please visit the website below:

Big Twin Carb EFI DTC Intructions codes Harley Davidson Forums Harley...
Good luck

Posted on May 08, 2015

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Posted on Jan 02, 2017

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SOURCE: 93 fat boy will not continue to run once started and wont restart

sounds like a fuel supply problem it probably has some build up in the fuel system from sitting so much, if it has a screen in the bottom of the tank it could be clogged with sediment from the fuel sitting. or in the filter if it has one could be clogged with old gas or dirt particles. Clean the tank if needed, unhook fuel line at engine and make sure there is flow from the tank. I sometimes blow air through the line back up to the tank to back wash any problems.

good luck

Posted on Mar 28, 2009

  • 3567 Answers

SOURCE: Bike wont start

First thing > install a new set of the stock NGK spark plugs for your bike. Check for spark before installing. If no spark, then check to be sure the battery wires are clean and tight. Is the kill switch on? Is the side stand up? It should be up when starting. Is the bike in neutral? Check the fuses. Check the wiring connections, are they tight?

If spark is present, is the gas turned on? Clean or replace the air filter. If the bike still will not start go ahead and drain the
carbs. There should be a screw on the lower side of each carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carbs to fill with gas. If the bike doesn't start properly then shut off the gas and remove the carburetors from the engine.

For both
carbs > remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.

Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the
carb back together. Remount the carbs.

Next, remove the water trap bowl at the bottom of the petcock, (gas valve). Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ). Turn the gas back on to let the float bowls fill then start the engine. Be sure to balance and sync the carbs when finished. If you don't know how to balance and sync the carbs, get back to me after you do the stuff mentioned above. This process should get you back on the road.

Please rate this solution as " FixYa " if all goes well. Thanks!

Posted on Mar 29, 2009

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