OK, here is the run down, 2011 900xp with it’s 2nd motor in. I bought a new engine from Polaris and installed with new oil tank. with less than 5 hrs on the engine it started smoking and progressively got worse. With my engine experience I was thinking rings. I cussed Polaris pretty good on this one since I had low hrs and no harsh driving.

Fast forward a month or so of being parked I took the rzr to my property and was doing some work driving fence line and couldn’t keep it running. little backfiring, lots of smoke and me fuming mad. So last week I got all my parts in to drop new pistons and cylinder in which I had from a previous motor with 5 minutes on it until the starter gear cut loose and cracked my case.
Get the engine out and start pulling it apart and notice all my oil in the crank case vs the oil tank. I didn’t think much of it since the rzr has been sitting for a month or better. get to the pistons and everything looks great. I went ahead and swapped the parts, put it back together and fill with fluids.
Rzr will not start now, code 105, with 3 under it. Great fuel rail needs to be replaced. So now I am researching my smoking issue and I run across a term in the manual about wet sumping causing smoking.

How does the dry sump work, is there a check valve somewhere, and is it going to be an oil pump or tank issue causing wetsumping?

By the way, my first engine was beat on like a govt mule is the 2nd reason I went with a brand new motor. I am man enough to admit I beat my first engine up. 2nd engine was coddled like a little baby. I have way to much money in this POS.

Thanks for any help you guys can give me.