If you remove the fan you might as well set a match to it mate, I tell you.

The bike main weight comes from the engine. They have made the engine very heavy obviously for reliability reasons, but you can shed weight by putting after market cans, removing pillion pegs (they are well heavy too) replace the handlebars with renthal alluminum ones.

Disk brakes will not signify a lot of weight reductions and the wavy discs are really just a gimmick, at least for our bikes they are a waste of time (I know cause I've tried them, they last a lot less i.e. they wear quicker and they don't improve braking at all)