How do you adjust rear shocks on Kawasaki Vulcan 1500 classic 1998?

To adjust the rear shocks on a 1998 Kawasaki Vulcan 1500 Classic, locate the preload adjuster on the shock absorber. Use a spanner wrench or a suitable tool to turn the adjuster clockwise to increase preload for a stiffer ride or counterclockwise to decrease preload for a softer ride. Make adjustments incrementally, testing the ride after each change to find the desired comfort and handling. Always ensure that both shocks are adjusted evenly for balanced performance.