La polizia è sconfitta
This one is a 1970 750S. It has the smaller Brembo front brake and not the larger Laverda brakes used from 1971.
The same? This bike's tank seems to be red (sort of!) while the other one was painted black. Still, I think it's also a CB750. It's fork gaiters have been removed and it has low "clubman" bars, but those very large instruments are unique to the original 750. You could see what speed the bike was going as it passed by! http://www.bikepics.com/pictures/315339/
A better angle /vehicle_676453-Laverda-750-S-1970.html 750/4 F1
Looks like a Honda badge. Honda CB750? It seems so: Four-badged.
Looking at the two pictures above, I believe this to be a (modified) K1 or K2 CB750 (1971-72) - non-original seat, twin disk front brakes, mufflers, paint job (!), etc... 1971-72 side cover and emblem