· very big dumb
just like anything else, get springs, a shock and gold valves or some other cart swap. this would get done on a s1000rr or v4 just as much as on a gromEdited to add: read the tech specs, and I must admit I'm kinda disappointed by the suspension department. Unadjustable fork, preload-only adjustable shock.
As usual for Suzuki, the bike is dimensioned for the average japanese rider, with no possibility to set it up for a heavier rider.