wont run

Any help would be greatly appreciated!! I have a 2006 Polaris Sportsman 90 2-stroke that would not run at all. First symptoms was loss of power, then hard to start, then no start. When I pulled the plug it was very fouled and cranking the engine I got quite a bit of oil coming out of the spark...

I have a 2000 sportsman 500. The starter won't engage. I used to bypass the solenoid with a screwdriver because it wouldn't start with the button but now when I do that it just sparks the solenoid. I figured it was the starter so I replaced it with a new one (the old starter was warn out) and I...