Hi Everyone.
I have been looking on this site for the answer to my issue but can't find it.
I have two 2009 Sportsman 400. they are the exact same ATV, so I have been trying to trouble shoot with no luck ( one running, the other isn't)
Both were running up until recently.
a month ago, I notice that if I turned on my head lights, the ATV would shut off. it would also turn off my gauges on the dash. I had a light bar on a toggle switch that I could use, but the factory headlights would tun this machine off.
I didn't have any time to look into it.
The other day, I got onto this ATV, Started it and put it in drive and it stalled. it would not start back up again.
I checked for spark and it has spark. I sprayed quick start down the carb and it Didnt start. didn't even hick up or anything.
Because I have a second one that is in 100% working condition, I have been swapping parts and trying to troubleshoot my other one.
I swapped the coil and speak plug wire ( had spark, would not fire)
I swapped the spark plug as well ( Had spark, would not fire)
I swapped the black box ( had spark would not fire)
I have not checked compression, but I have no reason to believe that is the issue.
One thing I notice is that it seams to have a weaker spark when compared to my other ATV that runs.
I also got a spark when I connected the coil to this ATV like a zap when I connected the little wires to it.
I also got a spark when I connected the little back box to this ATV. Like I zap when I plugged it in.
I have checked battery connections. ground was loose, I fixed it, but the ATV would still NOT start. I cleaned the ground to the frame as well.
Both coil and black box still work on my other ATV, just not this one.
I have pulled the crank cover off as well as the cam shaft cover to inspect the dowels because I read that they can sheer off and screw up the timing but everything looked ok
I removed the stator to inspect it visually,but no signs of burning. I ordered a brand new Stator as a spare but will not get it for a week or so. ( I have not swapped the stator from the other ATV to try)
I am leaning towards it being a week stator/pick up or maybe my kill switch/headlight switch is faulty and shorting out.
I have checked a stator on a different ATV and will be able to check this one with my tester and the help of youtube when I have time.
But how do I check or inspect the kill/headlight switch?
I am thinking there is some kind of short somewhere because it sparked when I connected the coil as well as when I connected the black box. and this short is possibly steeling the spark from the spark plug and making it weaker.
I read somewhere someone had a similar problem with the same age ATV and it was the silver control box located just above the black box. its expensive and don't want to just buy one....nor do I want to fry my other ATV's one to try it on this ATV.
what else am I missing?
advice and suggestions greatly appreciated.