Hi guys, I'm helping my brother out on this purchase and will be the mechanic on this fix. Basically there is a steal on a bike, a 2007 YZ450 for cheap. Only problem is that it has a cracked case where the clutch assembly goes into the left side of the case. It definitely will need a new case and not a JB weld fix. Other then that the bike is pretty mint. So here's what I need to know. First, is it worth it. The bike is about $2000 bucks and a new left case will be about $600. I want to do the job myself. What should I know before going into this??? Anyone that has done the left case replacement... please help me. I really need to know if this is a fairly easy job. I'm expecting to pull the engine, buy a manual etc. But I want to know if I just need a left case and gasket or is there more to this. Please help... Really want to help my younger bro out but would hate to make this purchase and not be able to fix it.