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I have a 2000 honda fourtrax and ran fine until it was sat for about 3 years. It didnt fire so we replace stator and it fires and runs when it has jumper cables hooked up , but the second you unhook them it dies. So we replaced the voltage regulator and still has to same problem. Checked the fuses and they were fine. Any suggestions ?
 

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Retro , what do think about how it kills as soon as you take the jumper cables off ? ---- it should run with a battery , I know everyone says you are not suppose to run with out a battery or you will fry it , but I have seen 300's run for 2 years without a battery even in the battery box , by kick starting it , so once the engine is running it should continue to run without a battery
 

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A three year sitting battery is likely junk. Once you get it going I suspect you will be chasing fuel issues as well because of stale/bad fuel. Might be a good time to remove and clean the fuel system as well and suspect the carb will need attention as well. Many great people here to help and see some potential headaches coining up for you
 

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First thing is I hope you clean the fuel system out on it. Sitting three years is not good for any machine. Said you replace the stator have you checked the stator output AC voltage? Ultimately if the state of produces ac voltage then you need to go to the voltage regulator. The voltage regulator is excited by DC voltage. If the battery is shorted to ground IE internal failure, if the battery is shorted to ground I eat internal failure, then the voltage regulator picks up nothing with the engine running and is excited by the jumper cables. With the jumper cables attached see what kind of DC voltage you have going to your battery. If it isn't the mid to low 13s or low 14 replace the battery and retest. I know there's guys out there that say they've had their bike running even with no battery in it but if the battery has failed internally is going to ground the juice will not get to the running components of the quad and it will not run

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Sorry guys it's voice to text so there is quite a few errors. Basically replace your battery retest. F unit starts and stays running test your charging voltage. Low-to-mid 13 to low to mid14's. If there's no charging voltage you need to test AC power from stator to voltage regulator. Stator AC output needs to be a minimum of at least double the battery voltage. It should be more in the thirties to forties. Voltage Regulators excited by DC voltage so there should be a 12 volt output lead make sure that lead has 12 volts DC on the voltage regulator. If all that checks out ultimately your voltage regulator is bad

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Retro , what do think about how it kills as soon as you take the jumper cables off ? ---- it should run with a battery , I know everyone says you are not suppose to run with out a battery or you will fry it , but I have seen 300's run for 2 years without a battery even in the battery box , by kick starting it , so once the engine is running it should continue to run without a battery
The short answer is that beginning with the 1998 Fourtrax models, Honda removed the Stator (charging system) from the ignition control circuit loop completely. Without a battery installed the ignition circuit was incomplete (open circuit), which is the same condition electrically as having the key switch or the kill switch turned off.

The OP has a 2000 model, so I advised that if he would install a battery, the motor would run.

If the OP's bike was a 97 or earlier Fourtrax it would continue to run without a battery installed, provided the charging system is functional.

I have a long answer prepared (with schematics), but I decided to spare you guys another of my long rants... If anyone wants it though, let me know and when I get back tonight I'll dump one on ya's... :)
 

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@dalekoven,

The OP's bike will continue to run whether the charging system is functional or not, provided a functional battery is installed. If the charging system is dead, the motor will quit running when the battery becomes too dead to supply sufficient power for the ignition.
 

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I still am not sure what Fourtrax model year 2000 he has , just figured it was 300 -----

Retro , that's good info to know for me , I thought what year it is didn't matter , I thought you could run them all with no battery and I have bunch of year model 300's , I have a 95 , 3 -96's , a 97 , a 98 and a 2000 , it must not have ever happen to me that the battery was dead on the 98 or 2000 and it would not run by kick starting it , that is really good to know because I already carry a small miniature set of jumper cables on my bike for the guys with ES bikes who are always needing a jump and maybe one day if I remember that info those cables may come in handy for my 1998 or 2000 300's , I now would guess that is why the cdi is different on that last generation 300's

learn something new every day , remembering it is the baitch !
 

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Fishfiles, I assumed he has a 300 too... I mighta got myself in big trouble if it ain't though. :) At least we know that all 97 & earlier 300s will run without a battery in them. It wasn't 'till 98 that Honda broke what was working fine all along... :-(

EDIT:
The 300s had 3 different ignitions. 88-94 were all the same, 95-97 were all the same and 98-2000 were all the same.
 

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I have seen batteries reverse polarity a lot in the last few years , it is a crazy thing , I put a load / tester on the battery , it will read negative 3-4 volts , and that is with all cables disconnected from it , I doubt that is your problem , just saying ------- but really , did you put a new battery in it yet?
 
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