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Honda TRX Discussions for the Honda TRX, 90, 250, 300, 400, 450, 700

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Old 03-12-2012, 04:06 PM   #1 (permalink)
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no spark

hey all i just put piston and rings in my sons 300ex now i have no power to the coil or the cdi i think the cdi feeds the coil but dont know what feeds the cdi i never messed with any wireing and cant figure it out can anyone please help me out my son is dying to ride
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Old 03-12-2012, 04:22 PM   #2 (permalink)
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The stator it's right behind the flywheel is it plugged in there is a set of wires coming from the motor check the connection you can also check for power there with a test light but check your connections and wiring before taking the side cover off your motor
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Old 03-12-2012, 07:12 PM   #3 (permalink)
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Make sure you didn't break any connection in the plug wire. Check the wire for fire with a test light
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Old 03-23-2012, 05:53 PM   #4 (permalink)
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well i have cleaned just about all the grounds and i got it to run my son rode it like 5 or 6 times it ran great today it lost spark again so i guess its back to the checking the connections again if anyone has any more input that would be great thanks for all your help
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Old 03-23-2012, 08:06 PM   #5 (permalink)
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Your reverse inhibitor may be bad if it's faulty it may think the bike is in reverse and not fire
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Old 03-26-2012, 05:42 PM   #6 (permalink)
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well just ruled out almost everythig as far as wire connections and grounds just found that there is no power comming out of the magnito so im gonna pull that tomarrow again thanks for all the info
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Old 03-29-2012, 05:22 AM   #7 (permalink)
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Had no spark on our 450r and had a tech do a complete electrical troubleshoot and he found the sparkplug boot was the culprit
There's some thing in there which can go bad
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Old 03-30-2012, 12:06 AM   #8 (permalink)
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Quote:
Originally Posted by halfpipe View Post
Had no spark on our 450r and had a tech do a complete electrical troubleshoot and he found the sparkplug boot was the culprit
There's some thing in there which can go bad
Yep, I've had those go bad. You use a flat screwdriver and unscrew the end that snaps on the sparkplug to get in there to it. It's a little rod type thing, I don't know what it's made of. Might be made of carbon or something, but it looks like ceramic.
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