Sportsman 90 bogging down

[copedaddy]

Have a 2000 Sportsman 90 I picked up for my youngest son. It had been sitting and would not start, so I pulled and cleaned the carb, cleaned the tank, put fresh gas in it and it fired right up. It seems to run out good, but after riding it for a few minutes when you de-cellerate it bogs down and will slowly stall out or drop down to a low idle.

I can fire it back up and it will pick up ok, but every few minutes it seems to want to bog down and throttle response is non-existant. Fuel and plug are fresh.

It does seem to be pretty smoky with the auto oil injection. Could to much oil cause this type of behavior ? Anything else to check?

Thanks

[LT80]

2 stroke or 4?

[BradCad]

Check your gas tank vent, might be plugged. Does it suck in air when you loosen the gas tank cap after it stalls out? Just a thought.