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Frank Angerano

No spark 2000 Yamaha bear tracker

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I could use some help. I have a 2000 Yamaha bear tracker. The bike has no spark. I went through the entire harness, even removed it and toned out all wires for shorts etc. changed the coil, cdi, relays by the battery etc. I have had my eye on the stator coil but tested it for voltage and got voltage from it. The bike was jump started by a car and also welded on. I heard that was not good.   My question I guess is will a bad stator still produce voltage but no spark ?

thaks. 

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Did you  check the  pickup  coil that  works with the stator to  produce the  pulses  necessary  for the  spark?. .The  stator  not only produces  the  voltage pulse the pickup  coil uses for the spark  circuit , but also  the voltage  for  charging the battery. The  stator and /or the pickup  could be  bad  and still  produce some voltage.

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Here  is the link to  download the  yfm 250xl  1998 service manual .. Your  2000 250cc motor  most likely  has the  same stator  and pickup  coil.

 

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Thanks for the link. I am going to have a look now. So the stator coil and pick up coil are combined not two different parts? 

One produces voltage for the bike and the other for the spark pulse ? 

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Just looked at the Manual huge help with the resistance numbers. Going to check all the numbers today. Thanks for the link again.  The rectifier/regulator could that interfere with my spark problem ?

 

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I  wouldn't think they'd interfere  with the  spark.. They  are  part of the charging circuit..  The  pickup  coil  uses  voltage  produced in the stator  to  send a  pulse to the  CDI  at  the  proper point in the  cycle  to  fire the  spark  plug.  The  stator  is producing  a  constant  3 phase  ac  voltage the  regulator /  rectifier changes  to the  12v DC  for the charging system .

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Crystal clear now. I tested the stator and the pick up coil. One side is in the paramiters (ohms) the pick up is not. I opened the coil housing for inspection and it looks good no obvious signs of broken wires burnt out etc not that it matters. Ordered the new stator assembly and the  gasket. I can't thank you enough for the input. Let you know how it works out. Meantime I completely re wrapped the harness and reinstalled it. Hoping this is the end! Thanks again. 

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Big shout out to Quadcrazy and its members. This bike kicks ass!! Took it up to the country to see what it can do and for a two wheel drive bike it's a beast. The bike runs and looks great. 

Thaks for the help. 

IMG_2903.thumb.PNG.e083011c96b95d14bb3f4c86c2ccd733.PNG

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