Hello it's my first time rebuilding a 4 stroke yz 450 engine. Not only that it's my first dirt bike engine rebuild ever. I'm looking at rebuilding the entire engine I salvaged what I could off my old crankcase as the old crankcase is garbage. I'm buying a new crankcase and other parts needed to do this build. I was just wondering if anybody could give me tips on how it's done and If anybody knows what kind of tusk tools are needed to do this build if you could let me know that would be awesome thanks.