2007 sportsman 450- one spark only

[Werewolf]

My wheeler originally had a fuel leak.But on trying to start it no spark. Took front end off, when I try to start it I get one spark then nothing. Come back a while latter one spark,replaced coil and cdi box no help?

[Gwbarm]

You have replaced the major components, two other things come to mind as to what is causing this, maybe a bad ground or pickup coil in the stator assembly. You could try unplugging the wiring from the pickup coil. and check for corrosion clean them up good and see if that helps.

[Mech]

Check the cdi is getting power and a good earth, and that the coil is earthed.

2006sportsman400-500.pdf

[Werewolf]

Back to the wheeler,bought a service manual. Should have done that long ago. Reading in there on that machine there is a switch in the throttle thumb box if the throttle cable has any slack in it the switch will make and no spark. Another thing I found interesting on this, there are no fuses. Thanks

[Mech]

Ok. And so was it the throttle safety switch causing the one spark ? 

We quite often see a one spark problem in here, on all sorts of makes, most of which don't have the throttle safety switch.

[westomatic]

Is the coil an OEM one or something from eBay of unknown origin? I have had coils in the past that were defective on arrival...

[p5200]

Have you tried unplugging the black wire from the kill switch? If the kill switch is bad that will allow it to start. I'm assuming it might be similar to my 500 Scrambler. Might be worth checking. My kill switch was corroded  after cleaning its been working fine. But unplugging black wire should let it have spark if similar to mine good luck!🙂