Question about 2005 Cpi Supermoto 50

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Bike has no power after replacing cdi/voltage regulator and spark plug coil

Would not go past 20 mph at full throttle. could it be the stator ?

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Yes it could be

Posted on Jun 20, 2014

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SOURCE: bike has no power after replacing cdi/spark plug/voltage regulator and spark plug coil

Check the magnetos, assuming the mofrl has them.

Posted on Nov 23, 2013

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1 Answer

What should the ohm reading be for coil and stator on 2003 yamaha venture 600?


The Stator doesn't give your bike spark. It generates the A/C voltage that the R/R turns into DC voltage. Your issue is with your CDI and or pick-ups Check them for clearence and make sure your ecu is plugged in good.

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No Spark, No Power coming from CDI to coil


Check the wiring on the connector plugs make sure all the wires are the same color on both sides, red to red blue to blue and so on. I had the same problem After replacing a stator and just plugging it in,after two weeks a new cdi and coil i noticed there were two wires transposed.

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My Rm 250 wont spark need to know the volts from stator to cdi plug. Got brand new cdi, stator , rotor and pick up coil but it still wont spark.


The Voltage From The Stator To The CDI Should Be Around 40 Volts(AC) At Cranking Speed. Be Sure Your Meter Is Set For (AC) Not (DC). The CDI Changes The (AC) Input Voltage To (DC) Output Voltage To The Primary Terminal At The Coil. An Electrical Shock Hazard Exist If Stator Voltage Is Checked With Engine Running. Always Perform This Test At Cranking Speed (R.P.M.) For SAFETY. 120 Volts (AC) Can Be Present With Engine Running.

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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.

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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:
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Good luck and thank you for asking FixYa.

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1 Answer

Hi i have an 05 crf150f it wil not get spark at all i have replaced my coil,wiring harness but my stator is getting spark. i think it might be the rev box (cdi)please help me i am tired of fixing it over...


well the stator doesn't give spark it give voltage and if you test it and the is voltage and you have replaced all that stuff with good ones then it is your cdi box.

to test the stator for voltage take a multimeter on the ac scale and test the output of the stator while kicking the bike over if you have voltage rising and falling then your stator is fine. if not you will need to test the pick coil in the stator area for a ground pulse this is what the cdi box uses as a reference for the position of crank shaft and piston. just like a crank sensor in a car. if there is ground pulse there when you back probe the wires coming out of the pick up then your cdi is for sure the issue. if you have any more question please ask. good luck

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Please help I have a 1980's model susuki dr 250 the ignition spark got steadily worse until it now has none.I have checked the ht coil,pulse pick up coil,earthing wires,cut off switchand had the stator...


I have a 83 DR 250 and i'm not getting enough voltage to create a spark, all I can suggest is that you check your battery and make sure its at full flavour. Check and see if you are getting any voltage prior to the ignition coil (should be 18-35v). If you suspect battery then try clutching it as the alternator moving faster might give you enough to get her going. Also check all your connections and earths. Earth wires are often overlooked and can cause you just as many problems as the actives. So give that a go and get back to me mate. Cheers

Jun 04, 2009 | 2001 Suzuki DR-Z 250

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Kawasaki kx80 has no spark


hi mate replace wires/cables and put another spark plug in it could be spark plug fouling and try the cdi in another kx80 also replace hd lead from coil to sparky

May 19, 2009 | kawasaki Full Suspension Mountain Bike Men

1 Answer

No spark


There are a # of things that can take your spark out, first I would see if you have power to your ignition coil (100V+). If none there you need to isolate your ignition switch (unplug it or take it out of the equation) and jump your starter solenoid manually or try pushstarting the bike. If still nothing check for voltage going into your CDI box, if none check for voltage out of your stator (over 100V) and your trigger or pulse coil (over 3V). If you find voltage at the stator and not the trigger replace the trigger and vice versa. If there is voltage for both replace CDI box (but be cautious to verify good ground for CDI box and ignition coil). If you find voltage out of your CDI box (over 100V) replace your ignition coil. Good luck!

Apr 11, 2009 | 1992 Suzuki GSX-R 600

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