Question about Yamaha YZ 250 Motorcycles

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My 1998 yamaha timberwofl 250 atv no spark at spark plug i put new cdi and coil i still din't get spark please help what i need to do next

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Is there power going to the coil ?

Posted on Sep 09, 2009

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Your pickup coil is most likely bad.there are five wires coming out of the left stator side. three yellow or white and the other two are the pickup coil. trace them to the connector under the seat or tank . unplug the connector and check for continuity, if none is there , the pickup coil it is bad. yamaha sells the stator and the pickup coil together. very costly , you can buy the pickup oil off ebay for about $30.00.
be careful as the screws holding the pickup coil in are lock tited in and need to be heated to remove them without damage.

or

When a YZ is not getting spark, it is either a bad spark plug, bad source coil, bad pulsor coil, bad CDI box, or bad secondary coil.


Posted on Sep 09, 2009

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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:
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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.
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8. Faulty ignition switch.
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10. Security alarm failing to disarm needs reset
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
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Yamaha YZ250 Project Part 1 No Spark
YAMAHA YZ250 Owner Service Manual
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http://mybikemanuals.com/yamaha/yamaha-yz-owners-manuals

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