Hi all! I bought my first 4x4 400 Arctic cat yesterday. I will mainly use it around the farm but It will also get some recreational use. It is a basket case, the engine is apart due to a piston coming apart. The previous owner had the crank replace, bought a new piston and head, but lost intrest and was moving so I bought it. I ordered a factory service manual to help me put it back together. I hope you guys can give me some good insight on this project. I will post some pics when I get a chance. What are some good mods/ updates to do while I have the engine apart?