I've never really understood the café racer thing. Each to his own I guess, but basically it appears to me you're just removing all the practical good bits and devaluing a classic bike. Fair enough if you've just crashed it mind!
Ditch the air box and replace with air filters which are more expensive and difficult to set up and run optimally.
Remove the under-seat storage (toolbox, puncture kit, chain/lock and waterproofs gone).
Remove the fairing and any wind protection and comfort.
Fit clip on /dropped handlebars to create a less comfortable riding position.
Fit dinky indicators that no one can see.
Fit some dodgy radial oversized tyres and drop the forks to ruin the handling.
Then tell the insurance company about all the mod's and watch your premiums go up.
I s'pose on the upside you might like the look of it, even if you don't enjoy riding it so much.