I wouldn't mess with the forks or the shocks unless I *really* knew what I was doing.
Read the book Total Control - High Performance Street Riding Techniques by Lee Parks. He has a whole chapter dedicated to the geometry of the bike, and how the different aspects of the suspension (compression and rebound) affect handling and overall safety.
I wouldn't just go screwing with the preloading on the forks just to lower the bike, because this could have very bad consequences for the handling and safety of the bike.
Read the book Total Control - High Performance Street Riding Techniques by Lee Parks. He has a whole chapter dedicated to the geometry of the bike, and how the different aspects of the suspension (compression and rebound) affect handling and overall safety.
I wouldn't just go screwing with the preloading on the forks just to lower the bike, because this could have very bad consequences for the handling and safety of the bike.