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Cdi box, I keep blowing them after installing i get about 5 minutes and then lose spark to 2 of the 3 coils on my 2005 Yamaha Vector. Help

Have blown 3 CDI boxes now. Can charging the battery cause this?

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I had the same problem with my 2006 Vector. Blown 4 CDI units. Changed out complete wiring harness and Stator, new plugs, Carbs. We narrowed it down to the coils. They were for an RX1 (based on the part number). swapped out with OEM vector coils. installed new CDI.. Sled is running flawless now.

Posted on Jan 10, 2016

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SOURCE: 85 yamaha virago xv1000 are the coils & cdi igntor box interchang

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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

caroldon
  • 17129 Answers

SOURCE: 2005 Yamaha Kodiak 400 was

Since you have the CDI failure for the second time , it is important that the voltage parameters are checked on the bike charging system.
The CDI is equipped to handle a wide range but if there is any chance of the voltage build up being higher or containing Ac factors out of a poor rectification circuit, the CDI can be effected. So test the inputs.
Now make sure the outputs are also not shorting out, check the ignition system.
If you have made any alterations, it is an areas to recheck so as the CDI is not draining out into the new unit.
The CDI is overheating with a reason and if you have not found any such defects in the bike it will be good to send your olda nd damaged units to CDI service for review. It can be confirmed if this is a manufacturing errors for which you can even get a free replacement. make sure the ground connections are tight as well as the battery leads.

Posted on Oct 18, 2010

elizabe47102
  • 2 Answers

SOURCE: So I have a 1998 Yamaha r1. i wasn't getting spark to the spark plugs so i bypassed the CDI box then I was getting spark then I replaced the CDI box and still no spark the cdi box was used. so is it C

Yamaha usually have a starter relay switch off the battery positive cable check to see if its the starter relay switch

Posted on Nov 20, 2012

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2005 yz250 2 stroke has no spark! changed out spark plug, stater, coil, plug cap, cdi, checked wire harness for continuity? cleaned ground block and still no spark? what did i miss?


Hi, Rob1 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.
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Hi, Jeff orange wires are usually, but not always, power wires and the usual suspects are:
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Hi, Anonymous and the usual suspects are:
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Hi, Edward and the usual suspects are:
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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.
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6. Faulty ignition coil, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
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Hi, Anonymous and the usual suspects are:
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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 CDI box.
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, pick up coil, trigger coil or CDI box testing needs to be checked with an ohmmeter at 70 degrees Fahrenheit
7. Faulty safety switches clutch, kickstand, neutral, off/on etc.
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For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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