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1987 yamaha yfm 100 champ no spark

I want to test coil ,stator & pick up but do not have access to a manual , I would greatly appreciate test procedure for these parts & a wiring diagram. thank you my product is not the same as listed could not find YFM 100 ON THE LIST

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  • dalinf250 May 11, 2010

    is it not working or why do u want to test these things.. if u have ohm meter u can test them but not sure on the output readings... the coil can be tested by putting th spark plug against th head and turning it over. but dont hold the plug unless u want a buzz


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