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I baught a yamaha 300 motor around 1985for my snowmobile am puting it in a gs250 body almost done but the cdi unit was missing i found one but the blue wire isn`t there on the cdi i cant get it to spark? this cdi is off a 340

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  • Donald Robichaud Jan 23, 2013

    i think this blue wire coming out from the stator is probably the trigger wire but there isnt one on the cdi

  • Donald Robichaud Jan 23, 2013

    this is a snowmobile it posted it as a motorcycle lol

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  • Contributor
  • 11 Answers

It could also be the neutral light wire

Posted on Jan 24, 2013

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6ya6ya
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Posted on Jan 02, 2017

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  • 78 Answers

SOURCE: CDI Unit is missing

does this work for you?
http://zorch.maow.myip.org/bikes/wiring/ts-185.jpg
good luck!!

Posted on Dec 22, 2008

  • 1 Answer

SOURCE: 83 yamaha tt600e no spark

The CDI unit on the 83 model (TT600) is located under the fuel tank and suffers from heat
exposure.The solution is to get specialist help to open up the sealed CDI unit and repair/
replace internal connections (which are readily available electronic components)
When you re-install it put some heat shielding material there to protect it and this
will be OK as repair will utilise stronger parts,I think.
Later models have the CDI unit moved to the head-stem area.

(this info from a Non-mechanic who remembers what was done to his TT in Australia, many years
ago)

Posted on Jun 12, 2009

  • 3567 Answers

SOURCE: 1983 yamaha xj 650 no spark already changed the

  • Do you see spark? If not, check the side stand kill switch. It kills the engine so that you don’t start out with the side stand down. If broken or out of adjustment, it would kill the spark. Check for a broken wire at the side stand switch and coupler. Try moving the side stand kill switch by hand. If that doesn’t work then wire a jumper around the switch to bypass it.
  • Is the handlebar kill switch on? Is it shorted out?
  • Are you getting power to the coils?
  • Check the fuses. How good is the battery? Try a jump start from your car battery.
  • Check the operation of the ignition switch and all kill switches with a volt ohmmeter. 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 or side casing. If still no spark, get CDI system and coils checked at the dealers shop.

Posted on Aug 06, 2009

  • 10 Answers

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

Posted on Aug 12, 2009

Adrian762
  • 425 Answers

SOURCE: 2003 yamaha rx1 snowmobile my engine light is

Go to this site and get yourself a manual, it should contain the information you require plus a lot more:

http://www.yamaha-motor.com/sport/myyamaha/prompt/L3Nwb3J0L3NlcnZpY2Uvdmlld21hbnVhbHMvdmlld21hbnVhbHMuYXNweD9scz1zcG9ydA==/Owners%20Manual/starthere.aspx

Posted on Feb 10, 2010

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The power supply is common for all the coils.
Have you switched the coils (wires marked 1 and 2)? If still the same coil non sparking, replace that coil.
If the same output non sparking, check the pulser coil for that cylinder. Invert both pulser coil connections (white red and white black). If the miss is on the same cilinder, replace the cdi. If the miss is on the other cylinder: replace that pulser coil.

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If it is a CDI unit it could be that even tho it my test ok.
If you have not all ready done so, take it to a bike shop and get them to test it under load. It should only cost a few dollars to have this done.
And change Spark plug even though it my look ok it could be shot.
And make sure that the CDI has a very good earth.
I have found this problem with one of my bikes in the past and this fixed mine.
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Hi, Wesley and the usual suspects are:
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2. Spark plug cables in bad condition and leaking check for spark leakage in the dark.
3. Spark plug gap too close or too wide.
4. Faulty ignition coil or CDI box.
5. Battery nearly discharged.
6. 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.
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