Question about 2004 Honda CRF 250 R

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There is a good spark good compression clean fuel but it wont start

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  • clive pearson
    clive pearson May 11, 2010

    How did you check for fuel and spark at the cylinder , ie: was the plug wet with fuel when you removed it and did you check the actual plug was sparking ... Some plugs will spark outside the cylinder but fail under pressure ... if the plug was dry chances are the carb jets are blocked or the fuel line to the carb , I know you say youre getting clean fuel but at what point ?. regards Vortash

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Hi there... Here is some food for thought.... If you have good spark, good fuel and compression , check the rectifier, If this is faulty you will get the same symptom's  The rectifier is generally located under the seat and is one of the first things coming off the battery,  ITs primary function is to control the power coming from the battery to supply a steady and cleaner power supply to all electronic components so.. you may have spark but your timing will be either lagged or premature before the spark can ignite it. ITs generally not an expensive part and is usually over looked in most cases like this...

Posted on May 14, 2009

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