The standard suspension is set up for a 75kg rider. How many k's on your bike? Keep in mind that the original shocks are ok until about 40000km. They gradually get worse and can't soak up the small bumps any more, resulting in a jarring ride. This will affect the cornering on bad roads. Setting up a suspension involves a bit of measuring and a bit of trial an error. I have never bothered myself, because I am pretty close to standard weight. I adjust the preload while riding to suit the extra weight with luggage. I just reach down and turn the knob until it feels right. I suspect you won't get the result you want without new shocks.