View Full Version : need help with eton 90

10-07-2005, 10:35 AM
i have a eton thunder 90 atv. i am not getting any fire to the plug. i checked the key switch, the kill switch. I changed the spark plug, coil, stator generator, and the cdi box. I checked for broke wires. I dont know what else to do? Is there a wrong way to replace the stator/generator? Please help. thank you

10-07-2005, 10:39 AM
Check the ground?

10-07-2005, 11:13 AM
do you know which ground it might be? the starter turns the motor over. i found a ground wire that looks to be cut off by the starter relay but there is no sign of it ever being hooked up before.

does anyone have a wire diagram for this bike.

10-07-2005, 02:58 PM
Have one for the Eton Viper.

10-07-2005, 10:20 PM
Does the Eton have a tether type kill switch. ON my son's Predator 90, I spent two days trying to determine why I was not getting a spark. It ended up being a bad tether switch. I unplugged the two and taped them together, then I got spark. I ordered a new one but wish I would have went with a Pro Design. Hope this helps....

10-08-2005, 05:54 AM
when i put the ohm meter on it it checks good. maybe i should bypass it and try it that way just to see.

10-08-2005, 08:59 AM
Let us know what you find when you try to bypass it...

humboldt hills
10-24-2005, 05:02 PM
I am having the same problem!
Did you figure anything out?

10-25-2005, 06:43 AM
no, it still dont fire. i have changed the coil, cdi box, stator generator, spark plug, checked all my switches and i checked all my grounds that i could find. so i am stumped. i think i am going to sell it for parts.

humboldt hills
10-25-2005, 11:07 AM
Hooked mine up to an ohm meter today and found out the new stator I received was defective.

10-25-2005, 11:17 AM
how do you check the stator? do you have a diagram?

Dave J.
10-31-2005, 09:04 AM
Hi new to the board and had the same problem with a e-ton thunder. I replaced the stator and still no spark. If you look at your handel bar control off & on switch it has two wires that run to the stator. What I did was to run a ground to one of the wires, either one will work. This should correct the no spark problem but will disable your key switch from being able to shut off the quad but you will need the key switch in the on position to use your electric starter. I now this dosen't fix the problem completly but you should be able to ride it. My kids ride ours like this and we have had no problems with the lights or eletrical. Hope this helps

Dave J. pm me if you need a pic of the wires

11-11-2005, 02:16 PM
thank you for all the help, but i still cant get it to work, so i am going to slove the problem and sell it.

11-11-2005, 07:41 PM
Did you check the brake switch , if it has one? Or the sparkplug cap?

11-11-2005, 07:51 PM
yes i did that too. the coil pack came with the new wire on it.

humboldt hills
11-12-2005, 05:54 AM
befor you sell, you should find a good service guy you can trust to look over it. Don't go to the dealer, ussually they just have their brother look at it and charge you out the *****, and still don't fix it. Find a small shop thats been around a while with a good rep, because selling something that doesn't run, won't sell for a 5th what its worth.
If you do deside to sell, let me know, it would be nice to have one for parts.

10-08-2006, 04:33 PM
I have a 2005 Eton Viper 90 that also has no spark. My son had went though heavy water, it kept going, 20 min later he shut it off, it hasnt run since. Took it to one shop and he said that the stator and coil was burned up. He also asked if we had taken anything off, no, but that the voltage regulator was missing, the bolt was there though, so when the stator got burned, and that regulator wasnt there, it burned up the headlights also. Due to his unprofessionalism in another area, I removed it from his shop. I replaced the stator myself, but not the coil bc I thought the man was just trying to get more $$ out of me. Once we replaced the stator there was SOME spark, but it was yellow, but it was more than before. So I take it to an Eton dealer, and they came back with that the coil was fine, the voltage regulator the other man put on was bad, and that the air filter was on wrong and damaged and had caused trash to enter the carb, so the fuel lines need to be cleaned, and he assumes it will start. Well, I know for a fact that the air filter isnt damaged bc when it first broke down thats what we checked. It WAS a tad damp, we dried it out and put it back. I dont see how dirty carb would keep it from getting a spark?? Not to mention they want $160 to clean the fuel system!!It also sprang an oil leak when we had someone check the igntion switch. After cleaning it with contact cleaner to see where it was coming from, it was coming from where the oil line comes from the pan and goes in behind the stator. They want another $160 to take off top end to find the oil leak!!! You can SEE it with the human eye where its coming from!!! Do I pay them the $160 to clean the fuel system, and what do mechanincs do when they say this will fix it and I pay it and it doesnt???

10-08-2006, 04:40 PM
Not to mention that I cannot believe that there are this many ppl out there with the exact same problem and no one can find the problem! No one else has said anything about the fuel system. Surely with as many ppl has had this problem that Eton hasn't discovered a fix??? I just want to scream.....if we ever get this bike fixed, we are sticking a for sale sign on it, bc no atv to me, is worth this much trouble....