Question about 1974 Yamaha XS 650 A

1 Answer

2000 V-STAR 650 YAMAHA CRUISER

IT HAS FUEL TO CARBS HAS POWER TO COILS, CHECKED KILL SWITCH, AND KICKSTAND SWITCH AND FUSES, ALSO, REPLACED ONE COIL AND BOOT JUST TO MAKE SURE, IS THERE ANYTHING ELSE BESIDES THE CDI UNIT THAT I CAN CHECK. BEFORE SPENDING$$$$ I HAVE NO SPARK COMING OUT OF COILS, BIKE HAS SAT FOR ABOUT 6 MONTHS AND RAN WHEN HE PARKED IT, THE BATTERY IS FULLY CHARGED.BIKE ONLY HAS 11,000 MILES. WHEN TAKING IT APART THE REAR CYL... PLUG WAS BLACK IE LOOKED FOULED LIKE A TWO STROKE, AND THE FRONT CYCLINDER LOOKED LIKE IT WAS NOT FIRING AT ALL. WHITE ELECTRODE.

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  • AlexAyotte Dec 11, 2008

    I have power on bolth sides of the coil and i did use an ice pick light/. am I doomed to a CDI?

    99 v-star clasic. engin turns just no spark. any test\s for the CDI?

  • paul erickson
    paul erickson May 11, 2010

    have you tried new plugs?

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  • 193 Answers

1. #1 test. Obtain a 12 volt circuit tester, the type that looks like an ice pick with a wire coming out of the handle. With ignition on, hold the tip of the circuit test against the post of the coil, the post that is marked with a + The light in the tester should light up, meaning you have battery power. If you don't have electrical power there, trace back to battery to find out why. If you do have power at that point
2. Moving the the opposite side of the coil and place the tip of the tester again the post marked with a minus. With the key on, crank the engine. The light in the tester should flash. These 2 test have just tested your battery and ignition system. Bill

Posted on Nov 19, 2008

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5. Vacuum hose to the fuel supply valve/petcock disconnected, broken, cracked, or pinched.
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11. 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.
12. Loose or corroded wire connection at the coil, battery or plug between ignition sensor and module.
Spark plug cables in bad condition and shorting, cable connections loose, or connected to the wrong cylinders.
13. Ignition timing incorrect due to a faulty ignition coil, ignition module or sensors (MAP, CMP, CKP, O2, TPS, ETP, IAC,or BAS).
14. Faulty neutral, clutch lever, or kickstand safety switch.
15. Faulty fuel pump or fuse or relay.
16. Faulty CDI box if applicable.
17. Tilt sensor needs a reset.
18. Security system not disarming alarm needs a reset.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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