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Rob green Posted on Jul 20, 2015
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My cdi box is half fryed rear cyl not fireing changed box started unplugged box to check it started to melt coils good tack works could it be stator any thoughts thanks Rob

1 Answer

mikeuk

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  • Expert 74 Answers
  • Posted on Feb 11, 2016
mikeuk
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Check your Regulator/Rectifier. If this is sending too much current through the system it can destroy all your electronics very quickly!

5 Related Answers

Anonymous

  • 4 Answers
  • Posted on Jul 21, 2009

SOURCE: FIRING PROUBLEM

check your stator it might have a broken wind

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Anonymous

  • 4 Answers
  • Posted on Jul 25, 2009

SOURCE: please help I have a 1980's model susuki dr 250

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

Anonymous

  • 10 Answers
  • Posted on Aug 12, 2009

SOURCE: my 1991 yamaha fzr 600 wont start

how long did you let it sit for with gas in the carbs, you may have clogged up your jets. after awile gas will break down and turn into varnish, if your bike trys to push the varnish through the system it will clog the jets. try to take off your seat then remove your plastic over the gas tank. remove the gas tank and you will see four bowls *silver ones right next to where the gas tank is on the carbs*. your bowls are in sets of two. there are drain screws on the bowls to remove the gas inside. remove the 16 screws holding the bowl onto the carb. *4 on each* inside you will see your floats and jets. carefully loosen the jets with a screw driver then finish unscrewing them by hand, they are brass and very soft. you should be able to hold up the jets to the light and see a small pin hole. if not get some carb cleaner and give them a squirt and blow them out. do not try to use anything to clean them out, they are very very sensitive and one knick will change the jet. after that i would spray some carb cleaner up the jet holes and try to clean them out also. if you have a compressor it would be wise to use that to blow out the gunk from the jet holes as well. after you run threw all 8 jets put them back together and see how it goes, if nothing you may have to check the jets again and if clogged again your carbs are gunked up and will need to be cleaned

Anonymous

  • 6966 Answers
  • Posted on Dec 19, 2009

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.

Anonymous

  • 1 Answer
  • Posted on Jun 21, 2010

SOURCE: 1997 Yamaha Kodiak 400, hard to start, once you

I would follow the fuel line all the way check the filter it should be inline and check the pump as well i would say its one of them two.

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Related Questions:

0helpful
1answer

Will cdi box stop stator from firing on a 125cc pit dirt bike

Stator will stop the cdi from firing the spark plug and either cdi or stator if bad will stop a spark from being created. The coil, wiring, kill switch and other things can also stop ignition spark.
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Miss fire after up to temp and runfor short amount of time. I get a miss fire coming to a stop..drops to cylinders or 1. will not accelerate at all boggs with miss fire.

Joe, i'm afraid we'll need some more info; year, make and model. Have you changed anything to after market like air cleaners or exhaust? How many miles are on it?
Jan 14, 2015 • Motorcycles
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Not firing how to check coil

Try to change your cdi box that's what I did
Jan 03, 2014 • ATVs
0helpful
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80hp yamaha idles good.but when I cuts off when put in gear

Sounds like it is running on two cyl,could be many things,check for spark,change plugs,check compression,clean carbs,check fuel pump diaphragm,check stator,coils,cdi,trigger coil good luck
Nov 20, 2013 • Boating
0helpful
1answer

No fire to coil changed stator checked ac voltage with meter on 3 white and brown and green wires voltage to rectifier no power on red or white wire to cdi,changed cdi box still no voltage on coil

Do you have a teather switch ? I would suggest start by checking the resistance of the on off switch . Then procede to the cdi relay. If you do not know how to test such items let me know and I will break it down step by step.
0helpful
1answer

I have a 82 yamaha maxim 750 thats not getting fire to the plugs an woundering if u can tell me a little to get me startyed...

Heres how it works.

There is a 1.stator and 2.rotor and 3.signal generator, located on the cranckshaft.
1.Stator produces A/C current
2. Rotor has magnets in it and goes around the stator and is part of the A/C current process.
Rotor also has a raised spot on the out side of it which the signal generator identifies.
3.Signal generator is a wire positioned just above the rotor to read the raised spot on
the rotor every time the rotor spins around. This wire tells the cdi to fire.

The CDI which receives the signal from the signal generator wire. Sends the signal to a coil.

The coil is energized and fires.

Always check the components in reverse order, because the stator, rotor and signal generator rarely fail.

1st, if your getting power to the coil and the coil doesn't fire , then its the coil .
2nd if your not getting power to the coil, then its probably the cdi.
3rd. Check that all the wires are making a good contact before you change your cdi, because
cdi is usually exspensive.
4th before you purchase the cdi, make sure the stator and rotor and signal generator are working.

This will get you started.
best regards
Big Al
0helpful
1answer

2005 virago 250 will not start

check stator, ign coil, first things i would check, fire starts at stator, goes to cdi then to ign coil, usually stator, make sure spark plug is good
0helpful
1answer

At idle and half throttle the front two cylinders dont fire

The year of the magna can make a difference on the answer. Early magna's had two cdi boxes. Later models had one.The front two cylinders use the same coil and possibly the same cdi box.I suspect a bad coil since since it operates both cylinders. Compare the readings between the two coils or switch them to see if the problem changes from front to back. This will work for duel cdi box models too. If these checks show no change in the front cylinders not firing, You probably need a new pulse pick up(the cdi equivalent of points.
0helpful
1answer

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!
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