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Hello out there in Honda ATV-world,
Just recently, l had to fix my friend's '97 TRX 300 with the problem of spark only after releasing the starter button, this after several times it did run then die and come back again but finally no start.....kick starting was harder than usual but it would not fire either.....
l did all the usual resistance checks and other electrical verifications: all in range/good. The only one not possible was the stator V AC output.....go figure! He has had the "usual" battery replacement over the years, and upon reading Forums, the Reg/Rectifier is a grounding pathway for the trigger or pulser coil, so that was replaced: still the same symptoms......Upon relpacing the stator, she fired right-up/kick started like usual, etc.....good to go. He now has a Reg/Rectifier spare as l put the original back on and charging voltages are good......
As l've seen in Yamaha ignition systems on their atv's, there is a 2 stage ignition "mapping" where at low rpm, ie. kick starting and electric cranking, the stator puts out a required voltage for the CDI to set retarded timing for ease of cranking, and especially, kick starting......upon engine firing and at idle or higher rpm's, the timing gets set to regular/"advanced"/advancing ignition timing....... When you release the starter button with a failed stator, the spark you momentarily see is "the regular/operating timing"(and tells you the pulser/trigger coil is working) which is advanced for that rpm(of cranking or kick starting), and that's why she's hard to kick over and the starter is working harder/drawing more amps.. when this "2 stage" ignition system, via an improper, low rpm, stator output, shows spark after releasing the starter or kick starting it's because there is no or out-of-range voltage at the low rpm of kick starting or cranking.
Of 4 TRX's that have had this type of spark problem, l've replaced 2 stators, 1 pulser/trigger coil(visibly cracked--be careful when replacing it: it's easy to distort the metal base when tightening it down and "crack she goes"), and 1 Reg/Rectifier......
Hopefully this helps and happy to pass on my experiences........
 

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Welcome to the forums. What an introduction..! Glad you figured out your issues, your post will be helpful for future reference I’m sure.
 

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welcome to the forums. 9 out of 10 times, when they spark when and after you release the start button ?, its a bad c.d.i. :).
 

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Quote" abf1111 , this after several times it did run then die and come back again but finally no start " Quote

abf is talking about a different problem ==== when the cdi goes out where it will only sparks one time by pressing the start button quick and release , it doesn't have any effect on the running of the engine , once running the fire is there all the time , I have run 300's for a long time with the " one fire issue " , was very use to it , the engine needs to be tuned well or you may have to press that button 30 times , but my bikes would always start right up with one quick push of the button or by kick starting it
 
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