Search for "turbo" and you should get a few hits. I doubt anyone has tried it with a Cross bike (or a Vision) because of the uniques problems you would have with routing the pipes and getting the air into the engine. The Cross bikes and the Vision all have cast frames and the filter housing is built into the frame. In order to get air in from an outside source (turbo or supercharger) you would have to be able to figure out how to route the air in between the tank and the frame. Anything can be done if you have enough money...
IMO you'ld be better off going big bore and getting some head work / cams. You would have half the nightmare and a lot less expense.
Retired USAF, IYAAYAS!
2008 V-Star 1100 Custom Bobber project
2011 Crimson XR with Forged Highway Bars / Hard Bags / Passenger Backrest, Ness parts including Smooth Layback Plate Frame/Mount / Rad 3 Mirror / deep cut grips / drivers floorboards /shifter peg / brake peg / passenger pegs. Witchdoctor black rack, Lloydz filter / timing wheel / VFC III, 7Jurock windshield, Drag Specialties seat.