I have a F4 750. I have fitted a 120 70 front Pirelli Dragon supercorsa tire. I had the tire deform at high speed. The tire has been sent to Germany for inspection. Has any one had any problems running a 120 70 front tire?
My mecanics told me not to use such tires... as it's said in the MV user's guide... Tires in 70 may touch the front fender, or even under hard braking the bodywork.
I found some D208RR in 120x65 that seems to be great on my F4 (500km for now).