If your 750K0-K6 has 4.00x18 rear tire, or 110/90x18 (for performance reasons, like me...), it can be quite a lift to stand it. One thing that helps enormously: I have a 1x4 board lying on the ground where I pull the bike up to park it (centerstand every night). I stop with the rear wheel on this board: the bike rolls right up on the stand with a tug.
If you have (stock length shocks) a 130/90x18 rear tire, this supplies a similar height to the rear, making the lift easier. It is significantly larger than a stock tire, so there is a performance penalty to be paid in cornering and unsprung weight, but it works for lifting.
With the post-1976 750 ("F" and K7/8) with the 17" rear wheel, the oversize tire situation is a little harder to resolve, if desired for lifting purposes, but a trigonometric 5.10x17 with the matching 4.10x19 front can do it nicely (if you can obtain a pair!).
I have plans for the near future for a short lever extension device, too: it would help with the foot lift force. This is simpler for the "F" bikes with the pipes on the other side, not quite so simple for the "K" bikes. This gizmo (at present) has a flipover hinge so it falls forward when the stand is up, so as to not jab the rider in the ankle while riding. It has to be "deployed" backward, hopefully with the toe of your boot, before use. These gadgets were available in the 1970s as a slip-on, slip-off unit: I remember seeing a couple of them lying on the shoulder of I-90 in 1972, where they had fallen off of someone's 750 enroute to the Black Hills.
