I haven't read all the posts lately, but figured I would give a little update and info.
My riding buddy tore open his wife's 2012 RMK 800 yesterday. 1700 miles only ridden at high elevations out west. Did some quick measurements and found out that the cylinders are pretty far out of round. Also the cylinders have a taper. The wear on the walls look actually pretty good, though the pistons are definitely rocking some in the holes. The pistons are not the same size between the 2. Both pistons have some deto marks on the ring landings. The ring gaps are to wide and have pitting on them.
The motor is using more than enough oil. He had turned up the oil pump when new, and might turn it back out some. He is using JT +4 oil.
The cylinder walls are pretty close to the same thickness as the Doo 800 cylinders that were sitting next to the poo on the workbench.
Overall, the engine wasn't close to perfect, but wasn't as terrible as some would have you to believe. Though it probably would have lived another season, it's going to get fixed properly, as my bud is a perfectionist. He isn't sure yet exactly how he plans to properly fix it, but the cylinders will be round and untapered before it gets put back together. And polaris rings will not be used, and probably not poo pistons, though the poo pistons are actually pretty beefy.
Just thought I'd give an update, cuz I truly believe the poo 800 can be made to be just as strong and just as bulletproof as anything out there, but it won't be stock. And I still believe it can be made bulletproof for less than the cost of extended warranty.
His own 2013 800 will be getting torn apart as well this summer. It has around 1000 mtn only miles.