So I picked up an 04 sportsman 90 that was blown up. Previous owner didn’t have oil line hooked up n toasted piston, jug and rings. I put new top end on it. Has great compression. Bled the oil pump, machine fires up runs great for little while then it’s almost like it locks up or loses power because the machine just dies. If you go to kick it over right away it’s solid but after a minute it fires again but runs rough then dies. Let it sit and the cycle continues. To me it almost seems like the electric dies and motor vapor locks. I did notice when it sits fuel leaks out of over flow. Going to pull carb and clean tomorrow but didn’t know if these machines have the electric throttle cut off or what else I should look for.