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Classic trx300 no spark thread???

998 Views 4 Replies 3 Participants Last post by  Iguezz300
Hey guys, new to the forum. I’ve followed everyone for a while now. I work on buddies bike on the side and always get good info here but may have to finally admit defeat on one. Im working on a 95 trx300 2WD in near perfect condition. It’s used on a small acerage farm mainly for hauling feed and small things around. Sleeps in the shop every night since new and still with the original owner. Everything is original, plastics and racks are even perfect. (Just giving back ground on condition of bike) anyway, running fine. Stopped to open a pasture fence, died while idleing. Pushed to shop, no spark. Since then I’ve performed all ohm test per the manual I believe. Changed CDI (beat on both while cranking), changed coil, continually test with 2 different brand new spark plugs. Fuses good, voltage at cdi. Continuity with all 3 yellow wires from alt, spark generator test good. Took apart handlebar switch. Only test I can’t perform is peak voltage. I’m stumped guys. Is there something I’m missing or a secret I don’t know about?? I’ve just learned about this small diode under the front plastics. Could that be my issue? If so how do I test it? Any help would be greatly appreciated. Thanks
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but remember !..this still does not rule out a bad c.d.i. !!.
I 100% agree with shadetree on this one as I have gotten 2 bad CDI boxes in the last 4 months now.

When you say you replaced the CDI did you replace it with a new OEM one?
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