I would make sure that there is as little stiction in the forks as possible, especially that you have the fork brace on, you have to make sure that is mounted in such a way as not to exert any force on the forks (except for clamping of course
) For the stock frame I like to keep the suspension on the softer side as the frame is not strong enough to cope with larger forces that stiff suspension brings with it. The fork oil can not be too heavy or the bike will wallow, shocks should be a bit longer (you can use CB750 shocks as they are longer)
measure stiction by pushing on the front end and letting it go back up slowly. Note the position of the forks' extension (use the zip tie on the tube, and slide it down to the wiper before you begin this test) then pull up on the handlebars and slowly let the front end down. The distance between the zip tie and the wiper is the measure of how much stiction your forks have.....about 4-5mm is good.
I have not tried the Forza shocks, so I can not comment.