I have used that system, in Britain it is manufactured by Kliktronic........ http://www.kliktronic.co.uk/
I am also a left-leg amputee like your friend Stefano, I used it on my Yamaha Serow when I wanted to ride off-road after I lost my leg.
Well done for sorting out his adaptions, if he ever wants to talk i will leave my email, my wife is Italian so she should be able to translate.
Originally Posted by gpmucci
I didn't so much, just what I show in the photo and some little things more.
The robotic gear was done from a specialistic company.
Basically it is an electric piston working on the gear shift, you can see here:
You can decide to use it in manual or automatic way.
In manual you have a couple of button near to the left hand.
You push one to get the longer gear and the other to go down and you operate the clutch usually.
In automatic it is really interesting, because when you act on the the clutch the gear go up, and if you are braking the gear go down.
I did a fast tour in a very fast off road trip and it work very well, you can drive stand just forgetting the gear, each time you act on the clutch it change a gear.