2004 Sym Husky 125 Logo
Posted on Jul 04, 2009
Answered by a Fixya Expert

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Put new engine in carnt get a spark at plug sym jet 50cc euro 2004 model

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  • Expert 137 Answers
  • Posted on Sep 20, 2009
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Joined: Sep 20, 2009
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There may be several things causing this fault (your sure the plug is fine?)

The ignition systems on these bikes are pretty basic. The Stator plate provides power to the CDI unit, which builds up until the pulser tells it to send the power to the coil and produce the spark

1. is there voltage from the stator plate (under flywheel) - you can test with a basic multimeter.

2. is the pulser sending a pulse - also can be tested with basic multimeter

3. is the CDI blown? - swap out to test

4. Is the Coil blown? - can be tested with multimeter

it is also very possible that you may have got a couple of wires mixed up when you switched engines.

  • Joe Stanton Apr 11, 2013

    Check The Kill Switch On Handlebar,Cdi Ing.Systems Ground To Disable.Try Disconnecting Black Wire At Key Switch,It Should Fire If The Rest Of Wirinng Is Correct. Black Should Be The Ground Cicuit.

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