Question about Yamaha V Star Custom Motorcycles

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The rear cylinder on my 2004 Yamaha 1100 is not "firing". It has spark, and the valves are operating correctly. I dont think it's getting fuel. What would be the most common problem?

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  • bob_tim Jun 24, 2009

    Both plugs are new. Old ones did not look fouled. Bike sat for the winter, so I thought maybe bad gas. Changed it out. No improvement.

  • bob_tim Jun 24, 2009

    I just statrted checking the injectors. I found something strange. In the short rubber fuel lines between the fuel pump and the chrome fuel lines to the injectors, there was a marble in each one. Is this factory, possibly to act as a check valve?

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  • Master
  • 2,923 Answers

Fouled plug maybe
change it and see how it runs then find out why it fouled.

Good luck

Posted on Jun 24, 2009

  • Melvin Ramos
    Melvin Ramos Jun 24, 2009

    Since you mentioned that both plugs are new, then it could be an injector problem. You need to check or replace the wires as well.

    These are that things that I could think of. Hope it helps and have a good day!

  • Melvin Ramos
    Melvin Ramos Jun 25, 2009

    Yes, I believe that was set by the factory. Check the injectors properly and replace any broken gasket . or filter. You need to check also if there's a shorted electrical component in the injector system.

    If you are not extremely confident with electrical, then take it to someone who is. I think that interruption in the fuel pressure is the cause of the problem. Kindly double-check the injector system and let me know what you will find.

    Thanks!




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3. Check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
4. Loose connection at ignition coil or plug between ignition sensor and module.
5. Spark plug cables in bad condition, shorting, leaking, spark plug cable connections loose check for spark leakage in the dark.
6. Faulty ignition coil or CDI or electronic control module.
7. Faulty CKP, CMP, or BAS sensor.
8. Faulty ignition switch.
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10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have nice a day.
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For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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2. Spark plug cables in bad condition.
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5. Throttle controls not adjusted correctly.
6. Water or dirt in the fuel system.
7. Water or dirt in the carburetor.*
8. Intake air leak.
9. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.*
10. Enricher valve inoperative.*
11. Engine lubricant to heavy (winter operation).
12. Ignition is not functioning properly (possible sensor failure).
13. Faulty ignition coil.
14. Valves sticking.
* Carbureted models.
For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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2. Spark plug cables in bad condition.
3. Battery nearly discharged, should have 12.5 volts.
4. Discharged battery, check battery terminals for damage or corrosion, check the battery cables at "BOTH" ends for loose, corroded, or broken connectors, "INSIDE" and outside the cable harness, perform connector wiggle test and check cables with an ohmmeter if necessary.
5. Throttle controls not adjusted correctly.
6. Water or dirt in the fuel system.
7. Water or dirt in the carburetor.
8. Intake air leak.
9. Fuel tank vent hose and vapor valve plugged, or fuel line closed off, restricting fuel flow.
10. Enricher valve inoperative.
11. Engine lubricant to heavy (winter operation).
12. Ignition is not functioning properly (possible sensor failure).
13. Faulty ignition coil.
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For more information about your issue and valuable "FREE" downloads that you will need please visit the websites below. Good luck and have a nice day.
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