Question about 2002 Honda Cb 400 Super Four

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Hi.. my cb400 hyper vtec 2002,my problem is no spark while I start,I have check the pulser is good n I have try using other cdi also not getting spark,or I should check oil level sensor? Pls advice,

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  • Honda Master
  • 39,959 Answers

Hi, Dian and the usual suspects are:
1. Fouled spark plugs.
2. Discharged battery, needs to be 12.5 volts or better and be able to pass a "LOAD" test, your battery may show 12.5 volts but has little or zero amps and must be replaced.
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.
9. Tilt sensor needs a reset.
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.
CB400 no spark
How to diagnose no spark situation on motorcycle
https://onedrive.live.com/?cid=A057EECF814610E8&id=A057EECF814610E8%21138&parId=A057EECF814610E8%21137&o=OneUp
http://www.partsfish.com/page/oem-parts-for-honda
Honda CB400 Owner Manual

Posted on Apr 25, 2017

6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

pakis
  • 86 Answers

SOURCE: 2005 ktm 450 sx die while riding.

yes, you are correct, those are the two pieces that could solve your problem, but i would go first for your cdi, you may choose to have it tested first also, before you jump out to buy a new one.

Posted on Nov 24, 2008

  • 1129 Answers

SOURCE: Honda s2000, 2001 loose of

Sounds like an ignition component failure check for proper resistance through primary and secondary ignition coil windings, refer to service repair manual for exact specs, also the ignitor magnetic pick up may be not up to snuff, the only other ignition component to replace or check is the ignition module and/or plug wires themselves, sometimes when extreme demand is put on the ignition system the plug wires must be high quality and completely isolated from one another. Spark plug wires when routing cannot come in contact with one another in the slightest proximity.

Posted on Aug 23, 2009

  • 5 Answers

SOURCE: ktm 450sxf 07 wont start

buy a yamaha

Posted on Sep 25, 2009

polarcycle
  • 1392 Answers

SOURCE: Hi, i have 1981 YAMAHA XJ550 , sitting over a year

Sounds like your battery may be bad. The oil light will stay on till the switch senses pressure. You may have a bad starter switch, relay, or some other issue. Get out a manual and your multi meter and start testing.

Posted on Oct 25, 2009

  • 6 Answers

SOURCE: Okay so I just got my 1984 cr125r engine rebuilt

if its like a car yes this is all electicall so yeah it ll fry out try to let it dry if it doesnt start replace the part

Posted on Apr 07, 2010

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Cbr 600 f4i year 2002 will start but after running


Maybe electrical. Use an inline spark tester on one of the outside cylinders. Check to see if spark stops after start button is released. If so it seems that something is getting powered when the start circuit is activated but not powered in the run circuit. The cdi box or pulser coils are suspect.

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Hi and welcome to FixYa,

To my understanding, all of the CR250R wiring has to do with the ignition system. Initial checks:
  • disconnect the black / white wire from the engine stop button to the CDI;
  • pulsating low ACV on the blue / yellow & white / green wires from the pulser coil;
  • pulsating high ACV on the blue & white wires from the exciter coil;
  • pulsating high ACV on the black / yellow & green wires to the ignition coil.
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stator, CDI or pulser. Probably the CDI. It is a common problem

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Hi and welcome to FixYa,

Soon as the problem comes about, check the pulser coil:
  • passive - depending on the manufacturer of the pulser generator, anywhere from 50 to 500 ohms. As long as it is not shorted (0 ohms) or open (no reading), then it should normally be good.
  • active - while cranking or engine running, check the voltage coming from the pulser coil. It would be a pulsating 0.5VAC. It might be to your advantage to use an analog / needle type voltmeter.
Post back result.

Good luck and thank you for using FixYa.

May 27, 2009 | 1986 Honda VT 500 C Shadow

1 Answer

No spark on Hyusu


Hi and welcome to FixYa,

For a "no spark" problem with a Hyosung RX125, check:
  • temporarily disconnect the battery. With the engine on at both the ignition switch and engine kill switch, verify that the green wire to the CDI does not measure 0 ohms to ground;
  • if it does, check the ignition switch and the engine kill switch;
  • it it measures anywhere between 50 ~ 500 ohms, then reconnect the battery and check that there is +12 on the orange wire going to the CDI with ignition switch on;
  • for a pulsating voltage (high ACV) at the white / blue wire coming from the CDI going to the ignition coil;
  • for a pulsating voltage (low ACV, 0.5VAC) at the green wire coming from the pulser coil going to the CDI; and
  • of course, check if the CDI (black / white) is connected to the ground.
Postback results of tests.

Good luck and thank you for using FixYa.

May 27, 2009 | 2001 Hyosung RX 125

2 Answers

I am not getting spark on my 1997 suzuki bandit 1200s, there is a weak spark for a second then it stops and nothing, it will crank over fine, im almost positive its not my coil packs as i had a known good...


Hi and welcome to FixYa,

Just to verify and eliminate the ignition coils, tests for it are:
  • one terminal would have an IGN +12;
  • the other terminal would have a pulsating voltage when cranking;
  • passive test, primary (+ to -), resistance 3 ~ 5 ohms; while
  • any of the primary terminal to HT would be 15 ~ 18 kilo ohms.
The CDI could not be tested since it is a sealed unit. The only way to confirm if it is a CDI is to check the external factors and if they are present yet no spark, then it would be the CDI:
  • the CDI gets its triggers from the pulser coils;
  • the output of the pulser coils would be very very low ACV;
  • it would be preferable to use an analog/needle type multitester for the flickering pulser voltage;
  • the CDI also needs a "go signal" from the interlocks together with the starter relay;
  • try exercising the sidestand when cranking;
  • verify neutral light is on;
  • try starting with the clutch lever pulled.
Another possibility to consider is that the starter is consuming most of the power from the battery leaving very little for the ignition system to use and/or the ignition switch has some loose connection. The IGN +12 to the coil terminal should also test this possibility.

Please postback results / updates of tests performed.

Good luck and thank you for using FixYa.

Apr 28, 2009 | 1997 Suzuki GSF 1200 Bandit S

2 Answers

No spark


Hi and welcome to FixYa,

To my understanding, the problem is 'no spark' yet the engine cranks. Generally, to consider are:
  • pulser coil (least likely);
  • ignition coil (likely);
  • interlocks (likely);
  • CDI (most likely).

Offhand, the CDI would be the main suspect. Since the CDI is sealed, it is not possible to do component level checks. The only way to check if the CDI is good is to check the external connections; if they are good and yet no spark, then the CDI is bad.

How to check the above:
  • to check the pulser coil, measure the low voltage coming from it using an analog/needle type AC voltmeter. While cranking, it should show a flickering low voltage;
  • to check the ignition coil, use a continuity tester. Primary should measure 3 ~ 5 ohms while primary to the high voltage end would measure 15 ~ 18 kilo ohms;
  • the ignition coil has 1 terminal connected to the IGN +12 while the other terminal is connected to the CDI. This should have a pulsating voltage when cranking.
  • all the interlocks could be checked with a continuity tester. Please note that most interlocks has a diode connected in series with their wires.
The interlocks include:
  • clutch switch;
  • side stand switch;
  • neutral light switch.

Good luck and thank you for using FixYa.

Apr 21, 2009 | 1997 kawasaki ZX-6R Ninja

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