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No spark checked the fuses good.put a coil on it, spark plug in it.a CDI unit in it,checked the pickup coil resistance, stator resistance, main switch,handlebar switch.all good ,but no spark.whats the obvious thing im missing

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  • jeff Jul 18, 2013

    ya no volts at coil.thats why i been changing everything out.cant get any volts to coil

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  • Expert
  • 313 Answers

Did you check if you had voltage present .

Posted on Jul 18, 2013

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6 Suggested Answers

6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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  • 24 Answers

SOURCE: 2007 honda crf 100 No spark at plug

take a high impedance test light clip output coil side, and then touch primary trigger output while engine is cranking

Posted on Aug 19, 2009

Benimur
  • 6966 Answers

SOURCE: NO SPARK ON A 98 RM 125

Hi and welcome to FixYa,

Initially, test for the presence / absence of below described voltages using an analog / needle type voltmeter when starting the bike:

  • pulsating low AC voltage coming from the pickup coil;
  • pulsating voltage feeding the ignition coil.

Good luck and thank you for asking FixYa.

Posted on Dec 19, 2009

oldmanewtoys
  • 414 Answers

SOURCE: rm125 1999 no spark

what comes out of CDI box? if you have it going in it is rectified and more will come out. If not change CDI

Posted on Mar 07, 2010

miket756
  • 2702 Answers

SOURCE: 2007 KXF 250 electrical problem

when the ignition parts like the coil and the transistors in the cdi unit gets warmed up they dont work as well as when there cool,,,so a problem thats not there when cold will be there when its hot,,,,if the stator has a small fault in it when cold when it gets hot it turns into a big fault! the best way to find this fault is by swoping one part at a time till you fine the faulty part,,,or put it into the bike shop and pay through the knows for the fix? have you a friend with the same type of bike you could swop the parts with??? it a big big help if you have! i would start with the coil then the cdi unit,,,there the most likley parts to play up when they get to hot they go faulty!

Posted on Jul 12, 2010

  • 2 Answers

SOURCE: i have a cpi oliver

I possibly have the same problem. I have narrowed it down to a fuel (lack of) problem. If you remove the seat and take off the vacum tube leading to the fuel tank cut off valve ( on the bottom of the fuel tank) you will be able to squirt a little fuel directly into the intake manifold,replace the tube and hopefully it will start instantly.no dought it will then stop repeat the process several times.
I suspect there is an electric soleniod system to deliver fuel on startup, I have dismantled the carb and am fairly sure the problem is with the electric needle system on the rear of the carb.
Hope it helps

Posted on Feb 07, 2011

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Jan 06, 2016 | Motorcycles

1 Answer

No spark on kawazaki kl250 a3 1980 model


Sounds like all there is left is the plug wire from the coil - but it's probably a single unit - coil and wire w/ plug boot.
All that comes to mind is grounding. With a VOM make sure you have a ground. Also look further up the chain - follow the wiring the CDI unit plugs into for breaks. Headlight gets brighter when kicked over ? Follow the wiring to it's termination points, loose plugs etc.

Single cylinder engines vibrate an awful lot, with that in mind look things over. There is a chance the no spark condition is a product of an unrelated failure - ignition system could be fine. Check the stator coil for an open circuit where it should be closed.

Besides checking wire and plug condition, cleaning and tightening grounds. The stator is the first place I'd check.
Be careful and gentle, the coil wires are very fine and as such break easy. A shorted winding will show continuity but not generate power, a web search should give resistance ranges of the coil assy.
Too low fail/Too high fail ranges.

My brain is picked out....Hope it helps you.

Sep 02, 2014 | Motorcycles

1 Answer

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Aug 30, 2014 | Motorcycles

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Could be the CDI. Check the stator and pickup coil specs with a multimeter first.

Nov 17, 2013 | ATVs

1 Answer

2000 honda crv engine


coil, stator, or wire to ground and to kill switch, it is grounding out somewhere - remove from coil to test.that.
Get inline spark tester at princess auto cheapie 6.00 can, or 10 for a good one. spark plug, timing, head gasket burn valve, hard to tell without compression test. if low put cap of oil in cylinder and if goes up is rings, if stays low (under 50lbs should be 90.) if stays low is a valve or head-gasket.
Check plug if dry when trying to start vehicle with choke on then remove spark plug and inspect it.
is carb or fuel problem if dry, is electrical if wet!
check fuses, and stuff and wires but probably a CDI unit to control the spark, or if old is a set of points and condensor and the spark must be triggered by a CDI, a lobe, or a coil CDI unit combo.
The coils on stator send 12 volt, coil to sparkplug send 20,000 volt and the gap in points or ruluctors should be set properly, typically stator to reluctor is set by a book of matches not folded but put piece carboard in between,spark plug gap say double that..
I suspect without more input fuel or spark. if the engine wont turn over the fuel to oil mixture wasnt enough, or the oil injector for fuel mixture if two stroke maybe clogged and may destroy your engine.
I don't suspect this but giving things to consider later.
Some bikes there is wires in a rubber plug as a chaijn indicator and the chain can break this connection, not sure about 4x4 though.
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Nov 01, 2013 | Computers & Internet

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Symptoms of bad cdi igniter 1985 yamaha xj700 maxim


Hey Roland,
I have the same problem. How did you fix this problem? Was it the Ignitor or the Rectifier? Please let me know. Thanks.

Aug 02, 2012 | Yamaha Motorcycles

1 Answer

How to test CDI unit for KTM65 2009 to diagnose if faulty or not.


If you are able to use a digital volt meter and work your backwards from spark plug wire to coil to cdi to stator you can figure out where voltage stops.thats a fairly newer bike unless you really submerged that bike under water i dont think its the cdi box.it could be coil wire it could be coil.you want to check or change the cheaper parts before you go right to cdi because there not cheap.I have a yamaha banshee 350 and she was breaking up real bad.I thought because it was only happining on top end that the cdi was breaking down or stator was going bad.Found out with meter it was the coil wires and spark plug boots.These items have to have a certain amount of resistance or the do not conduct correctly.And spark plug wires and boots are not that exspensive.So thats why I say start from sparkplug boot and work your way back.Try that and Good Luck.

May 09, 2011 | 2009 KTM 65 SX

2 Answers

1977 dt 175 e and i can't get it to fire i put a new coil and still no spark


My old 73 175 had points, I don't know if yours does. There is also the stator/ magneto. Try disconnecting the kill switch or unplug the key cylinder. There is a more detailed check in the manual. I can't find my old 175 manual but ttr125 says 1) check plug for spark- clean or replace. 2) check entire ignition system for connection. 3) check ignition stop switch. 4) check coil. a- primary coil, b- secondary coil. 5)check cdi coil. a-pickup coil. b- charging coil. Since you have replaced the coil I will only give specs for the cdi check. The picture shows a plug under the tank disconnected. It has four wires brn grn red and wht. To check pick up coil resistance set ohm meter to x 100. attach the plus lead to red and neg. lead to white. It seems to have a short wire in each jaw of the alligator clips of ohmmeter that is pushed into the disconnected plug that contacts appropriate wire color. Reading should be 248 to 372 ohm at 20 degrees C (68 degrees F). Charge coil test places the plus lead of ohmmeter to the brown wire and neg. lead to the green wire of the open plug. Meter at x 100. Reading should be 688 to 1032 ohm at 20degrees C. Of course while doing step 2 check for good grounds and tight connection at plug cap and use a new plug. Good luck.

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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..

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