Hello all, i am a new one here, and i have a question about my fathers 2000 sportsman 335. yesturday we noticed that it was leaking oil out of the bottom of the motor, we investigated and found a small hole, the hole appears to be perfectly round, ect. so i am pretty sure its not a crack of any sort. when we turn the wheeler, it does not leak oil, and i put my finger over the hole, and it feels like a vaccume sucking air thru the hole. does anyone know what this is? i am wondering if there was a rubber piece of some sort, that may have just fell out...any help would be appreciated...