Anyone with Sportsman 800 have this problem that can help, after my 800 has been running for a while and i shut it off and then go then go to start it again it cranks a long time before it fires. battery is fine, engine is turning over fast. if i give it a little gas it seems to start better?

 

when you turen on the key do you here the fuel pump kick on. if you take off the gas cap is it under pressure, meaning vent lines arent working correctly. is the air filter real dirty?