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Need help! 1987 Yamaha Moto 4 350

P_syko

By P_syko
in Yamaha ATV Forum

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P_syko Apprentice

P_syko

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I’m brand new to 4 wheelers and just bought a 1987 Yamaha Moto 4 350. It has good compression and fuel, but no spark. I’ve looked high and low trying to find how to test all the components of the ignition system, but can’t find anything. This has a new CDI box on it, but I suspect it might be the stator. How do I test the stator on this? Any help would be greatly appreciated! 

  • Admin changed the title to Need help! 1987 Yamaha Moto 4 350
Gwbarm Grand Master

Gwbarm

Posted
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I would probably check the pickup coil for proper resistance and that it is putting out voltage first, the value should be listed in your repair manual. If you dont have a manual you should try to get one. Is your new CDI aftermarket, sometimes they dont work right out of the box, if the original CDI is OEM dont throw it away until you are sure thats the problem.

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Mech Grand Master

Mech

Posted
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Yup. What Gw said, and check the resistances right at the cdi also to make sure the wires are intact. Check them down at the engine then again at the cdi and compare the figures..

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