Information for my kawasaki OHC 400 project?

There is no fuel pump on a Kaw 400. Chances are good that you will need to professionally clean the carbs and fuel tank. I highly recommend you get it running first before you stick too much into it. The 400 was never a great bike to begin with, oil leaky things. If you can find a bike junk yard around there, you will likely find most of this stuff.