Only some aftermarket shocks have an adjustable valve. You most likely don't have an adjustment valve. List symptoms that make you believe you need better shock absorber performance.
Shocks.
Cars would use shocks or struts in front but not both.
To adjust mountain bike shocks effectively, first identify the type of shocks on your bike (air or coil). For air shocks, adjust the air pressure to match your weight and riding style. For coil shocks, adjust the preload to achieve the desired sag. Fine-tune the rebound and compression settings based on the terrain you're riding. Experiment with different settings to find the optimal balance of comfort and performance.
You cannot. Stock shocks are not adjustable.
used to absorb shocks.
there are no adjustment less you have air shock
ES 1000's are not adjustable .
About the only way is to adjust your shocks
if you adjust the shocks.
To maintain and adjust bike shocks for optimal performance, regularly clean and inspect them for damage, adjust the air pressure or preload according to your weight and riding style, and consider getting them serviced by a professional if needed.
The shocks on a 1999 Harley Fat Boy are not really adjustable. There are kits that lower the bike available on the after market.
All you can adjust is the preload. You need a spanner wrench. http://www.xs650.com/forum/