59ski-doo
New member
I have A 2007 Summit 800R. When I bought this sled the story was that it had a new 08 800R crate motor installed in it. I am About to order a piston kit and I'm not 100% sure what part # I need. Do all the 2007 to 2011 800R motors have the same bore? How can I tell the difference between the 800 engines. The engine in my sled is a mono block. There are no tags or numbers on the block That I can see. 793, 797.80????