I have not met the owner, but I know that he is technically skilled and has had his California also supercharged earlier. But I have seen this Centauro at the previous owner & builder. "Power-wheelies were always at hand", I remember him quoting. He has also a blog, but in Finnish (google translate helps...).
http://www.motomatti.fi/search?q=centauro
Here are some lines of that blog:
"
Max constant boost pressure approx. 0.25 bar, momentary 1.7 bar. Exhaust pipe diameter 38 mm.
路 Footpeg- and pedal transfer kit, rear fender (carbon fiber) self-made
路 Ride Height adjustment, stepless, rear frame made of carbon fiber/steel structure, self - made
路 Rear cover, carbon fiber, design and structure, own design, seat has a carbon fiber frame, covering self-made
路 Marchesini rims, polished
路 Charging controller and audible signals moved to be located under the headlight, headlight raised, own design
路 Battery transferred to a separate housing behind the gearbox, housing made of carbon fiber, self-made
路 Mirrors at handlebar ends, normal accessory, exhaust system partly original, partly self-made
路 Mechanical supercharger Eaton M24, mounted to the left side of the motor, belt drive from the crankshaft, transmission approx. 2x
路 Pressure piping and pressure vessel, self-made, carbon fiber
路 Intake bodies original but with two pairs of nozzles (other pair from Ducati 996)
路 Cast pressure-resistant hoses from urethane for the intake bodies
路 Second injectors and their second ecu with pressure- and motor rpm -detection, connectors, relays and fuses MTA, waterproof
路 Display for the lambda value in additional instrument panel, instrument panel self-made, splash water-proof, in the same panel also a boost pressure gauge
路 Re-cirulation valve Forge, adjustable, temperature gauge for the charged air
路 Vacuum gauge, measures suction duct pressure
"
https://ibb.co/pXJGTyp
https://ibb.co/MsLgZNk