Here's a lil diddy I made for Eli at Cheapskate Cycles. 3-piece design comes together nicely giving a clean no nonsense control. He got 2 sets as he is running a front brake drum. Lucky for him, I have a grip of new chrome dogbone levers hanging around.
I make these to fit your original CV, or S&S Super E/G, Super B, Bendix, Mikuni and SU carbs. They measure 5 1/4 diameter x 3/1/8 total height and includes a 5" custom-sized K&N for your filtering pleasure. Mikuni & SU requires adapter bracket ($40). Please specify which style you want when ordering. See store for ordering info, or hit me up at firstname.lastname@example.org