The easy pull does the same thing as adding to the clutch arm, inside the triangular box is another arm when adjusted it changes the leverage ratio. If it was me, I would put a new cable and get a h**da clutch assembly, as the ration is different. A 250 shouldn't be that hard to pull, I use 500 springs in mine and it isn't that hard to pull.
Incidentally when referring to cutting the clutch arm, it's not the lever but the arm that goes into the bottom end. I've done it to my 500's, it makes a huge diofference.