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My 2007 kx250f has no spark I replaced plug an coil wat else can cause this beside stater an Cdi box

Posted by Anonymous on

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 3567 Answers

SOURCE: no spark 110cc engine wont start

Check the fuses. Next, check for spark but with a new spark plug. How good is the battery? If needed, add water to the battery cells enough to cover the top of the cell plates.Try a jump start from your car battery. Is the kill switch on? Check the operation of the ignition switch with a volt ohmmeter. You should be getting power into and out of the ignition switch.

If the bike doesn't start and run properly check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. Broken or out of adjustment, it would kill the spark. Check for a broken wire at the switch or coupler. Get a service manual and check out the electrical section. Some bikes have a diode integrated into the turn signal relay. Try moving the kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it. If that doesn’t work, check out the relay.

Check the wiring harness. Did a wire come unplugged? Are all wires clean and with solid connections? Any abraded or pinched wires? Is the bike in neutral and the neutral light is lit up? If no neutral light, check the neutral switch and neutral switch wire on center casing.

Please rate this answer. Thanks

Posted on May 28, 2009

  • 3567 Answers

SOURCE: I have no spark 2000 KTM 125 sx

Before going to the CDI system go ahead and check the kill switches including the side stand switch, with an Ohmmeter. How good is the battery? Check the fuses. Check the wiring harness. Are all wires clean and with a solid connection? Any abraded wires? Check the operation of the ignition switch with a volt ohmmeter. Is the bike in neutral and the neutral light is lit up?

You can download a free PDF factory service manual by going to the website below >
http://www.carlsalter.com/motorcycle-manuals.asp
The manual should tell you in detail how to test the CDI and other electrics.

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Posted on Apr 08, 2009

  • 125 Answers

SOURCE: 1987 Honda shadow vt1100c no spark at any plug

The voltage on the coils is present except at the instant of firing. The interruption of the voltage is what causes the coil to fire. The cdi box is what causes the voltage interruption.
The interruption is very hard to detect. You are not the first to be stymied by that box. If you have access to an oscilloscope, I think you can see the pulse if it occurs.

Posted on Jun 15, 2009

ollie reece
  • 1167 Answers

SOURCE: my kx250f has no spark after replacing wire

are you getting power to these items best to check this before you carry anyfurther

Posted on Oct 07, 2009

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1 Answer

1400 intruder no fire to the coil pack front cylinder coil is good stater is OK fuses good new pulse good .is the cdi out


Hi, Earl and the usual suspects are:
1. Fouled spark plugs.
2. Severely discharged or a damaged battery, should have 12.5 volts or better and be able to pass a load test if necessary.
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 CDI box.
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, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
8. Faulty ignition switch.
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.
How to diagnose no spark situation on motorcycle
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Oct 25, 2016 | Suzuki VS 1400 Intruder Motorcycles

1 Answer

I have yamaha warrior 350 that has no spark. have changed cdi box, pick up coil, ignition coil, stater, spark plugs basically everything besides wiring harness. has 110lbs compression. i need help.


Hi Cheyenne, if you have a CKP sensor it needs compression to send correct signal to the ICM/ECM, make sure both spark plugs are in heads and use a grounded third plug to check for spark or hold spark plug cable close to spark plug in head. If still not getting spark the usual suspects are:
1. Fouled spark plugs.
2. Battery voltage below 8.7 volts, loose or broken battery cables, check the "NEGATIVE" cable at both ends.
3. Loose connection at ignition coil or plug between ignition sensor and module.
4. Spark plug cables in bad condition, shorting / leaking, spark plug cable connections loose.
5. Faulty ignition coil or ignition / electronic module
6. Failed CKP, CMP, MAP or BAS sensor.
7. Faulty ignition switch.
8. Security alarm failing to disarm.
For more information about your issue, please visit the websites below. Good luck and have a nice day.
Yamaha Motorcycle Service Repair Workshop Manuals

Oct 10, 2015 | Yamaha Motorcycles

1 Answer

I HAVE NO SPARK,i replace stater,coil,ignitor,plug AND STILL NO SPARK.thanks


try to replace cdi kit, but be sure that source coil is working good.

Sep 22, 2010 | kawasaki KX 250 F Motorcycles

2 Answers

Hi i have a 1997 yamaha 350 warrior i have no spark to the spark plug what could be


hello, you probably need to have your stator checked out, sometimes the pickup coil in the stator will go out, also you can try ign coil, the one spark plug wire is hooked to,warriors are bad about cdi going out, mine would idle, would not rev up, would bog down, source coil in stator probably needs to be checked also..

Feb 27, 2010 | 1974 Yamaha DT 360

1 Answer

No spark at plug. so iam guessing coil is shot. mac 110


Hi
You will have to remove the engine from the houseing to get to the coil.Not a easy job. It does not have points
Sam

Jan 07, 2010 | Poulan Pro Chain Saw 46cc 20"

1 Answer

No spark put on a new cdi box coil good and a new stater


hi,sounds to me like your cdi pickup unit has failed,i am not 100% certain but this will be located on the end of the crankshaft behind one of the enginecovers,there could be two other possibilities,motox bikes are notorious for breaking wires so check the wiring from the cdi sender unit to the cdi box and the coil,also check your "off"button it may be stuck in the "kill" position..hope this helps..cheers ian

Dec 26, 2009 | Suzuki RM 125 Motorcycles

1 Answer

1987 Honda shadow vt1100c no spark at any plug


The voltage on the coils is present except at the instant of firing. The interruption of the voltage is what causes the coil to fire. The cdi box is what causes the voltage interruption.
The interruption is very hard to detect. You are not the first to be stymied by that box. If you have access to an oscilloscope, I think you can see the pulse if it occurs.

Jun 07, 2009 | 1989 Honda VT 1100 C Shadow

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