Well pulling it apart is always the fun part.
I suggest getting a manual. If for no other reason, you should follow the torque specs on the jug and head and get the valves and cam(s) back in proper. As a plus, if you are mechanically minded you can put it together without much help. But the exploded diagrams or steps (depending on the type of manual) make it easier to not have 'leftover parts' when you are done putting it back together.
But don't take my advice to mean you shouldn't enlist an experienced helper. That's always a good idea the first time.