Engine Swaps Rzr 800 to 900/1000 engine July 4, 2015 I am thinking of swapping a different engine into my 2012 800 rzr 50 inch and am wodering if a 900 or 1000 engine will fit in the machine and if I can use the 800 transmission Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window) Related