The normal (OEM) engagement on these clutches is a small movement zone. This is due to having barely enough oil in the plates, relative to the amount of spring pressure on the plates. This makes them, in a word, "grab" quickly. See below for 'fixes' to this issue...
The adjustment on the 750 is simple: set the handlebar adjusters all the way in for some slack, then adjust the arm at the clutch for 1/4 turn from the "stop", which is: loosen the 12mm nut and adjust the slotted screw head in until it touches the lifter, then back out 1/4 turn and hold it there while you tighten it. If there is slack you dislike at the handlebar then, adjust the nuts and thread at the cable adjuster adjacent to the clutch housing: the lever should freely move between 1/2" and 3/4" as measured at the outer end. This method will let the clutch start to grip at about 1/3 of the travel from the grip, and fully engage by 2/3 of the travel.
If the clutch feels too sudden for your taste, you're not alone: in the early days of these bikes, the clutch was often described as an "in-out box" such as was found in go-karts of those days. To make the grip more progressive over a wider lever range (and smoother), you can add up to 4 holes in the inner clutch hub to increase the amount of oil in the plates, or you can cut down the tiny "dam" that is in front of the rearmost 4 holes, and cut sipes in a "v" shape in front of the remaining holes to gather a little more oil. It doesn't take a lot more oil to smooth them out. Pictures of this appear in the "clutch" section in my book.
