Hiya Alessandro, I'm Ian Osorne
I'm known as Oz and live in Crawley, which is in southern England.
Here the pics of my “Vespa” and the thecnical specs
The frame is a Vespa 50 Special with a lot of modifications.
 
Engine:       Rotax Max 125.
              Bore 54mm, Stroke 54.5mm. Counter rotation balance shaft, Centrifugal clutch,
              single speed. Pneumatic adjustable exhaust power valve. Electric start.
Cooling:      Internal water pump driven of crank. Rotax Max radiator. 
Carb:         Dellorto 34mm VHSA
Exhaust:      Made by PM Tuning
Drive:        Chain driven to a Piaggio Typhoon front wheel, fitted to swing arm. 130/70/10 tyre. 
Gearing:      12/13/14 tooth front sprocket. 75 to 95 rear sprocket. Currently running 13x90 sprockets.
              8mph per 1000rpm. Power: 30hp Revs to 13500rpm.
Other parts:  PKXL front forks. Cosa front rim, 100/90/10 tyre.
              P Range brake disks and calipers front and rear.
              Mychron 3 Rev counter/temp gauge data logger.
              

Ecco le foto di questa bella realizzazione: