I have a 94 Poloris 400L 4x4. I bought it a few years ago but I have yet to get all of the bugs completely worked out. Two years ago I replaced the Ignition switch and the CDI. It wouldn't shut off unless I turned the fuel off. Once I got that fixed it starts, runs, and excelerates fine, but now when I let off the throttle it looses spark. I thought it was a float issue untill last night I finally decided to see if I was loosing spark when it dies and it is. If I rev it up and let off really slow then it will idle down fine, but if I let off the throttle as in riding it losses spark everytime. It will start right back up without hesitation. I cleaned the stator connections behind the flywheel as well.
Any help would be appreciated.
Rusty

 

could check throttle control on handlebar, make sure you have 1/8" gap.
test coil wire and cap

 

Here is a video,that may help. Polaris ATV Thumb Throttle Maintenance Tips: Polaris ATV Maintenance & Repair Tips | eHow.com

 

It ended up being one of the "Black" wires that also connects to the CDI. It took me long enough to figure it out, but I rode it around most of the evening just incase. It is working like a champ now!