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I have a 1994 suzuki 300 king quad. It will not fire. On the old plug the spark was jumping around erradically at the end. I tried a new plug and same thing. It is getting good fuel. I tried a little fuel right down the plug hole, but still couldn't get it to fire. Could it be the cdi, or the coil. Any helpful hints would be greatly appreaciated. I am stumped. Can you somehow test cdi boxes.

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It could be your cdi box causing a misfire. First I thought maybe your regulator/rectifier, but you said you are getting spark, just erratic.

That quad has shifters in the middle, right?

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There are tests you can do on your ignition components using a multimeter, either buy a manual or contact your local dealer for specs. Check your coil wire and plug cap for damage and a snug fit. You might also want to check your flywheel key, you may just be getting spark at the wrong time.

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