Suzuki drz250 front shock adjustment . my front shocks are very soft . no sign of a leak . has adjuster on top of shocks . and have just found and adjuster for compression on the bottom . i cant get the screw driver slot to turn , there is a big nut around the out side and when i turn that i can here some thing turning inside the forks , but no change to the shock performance is noticed . does any one know of the problem ?

Follow this link on adjustment. C50 Shock Adjustment

They turn at the top of the shock to increase or decrease coil over shock spring tension, and some have a knob under the seat for damping adjustment, check your owner's manual for info.

AT THE TOP OF SHOCK YOU WIIL SEE A COLLER WITH A SERIES OF STEPS ON IT TURN COLLER UNTIL THE SHOCKS FEEL HARDER TO PUSH DOWN JOB DONE

under seat in front of battery box is your adjustable shock. You can adjust height a lil from there. If your looking for more of a adjustment you can get lowering kit which is pritty much different wishbone on the shock

The C50 can be lowered, but not by adjusting the shock.
Adjusting the shock only stiffens or softens the ride.

To lower the Suzuki Vl800 (C50), you will need to purchase a lowering kit, which consists of a new set of "lowering bones" (so named because they are shaped like dog bones).

You will need to remove the stock bones from the shock, and replace them with the new bone from the kit. You can buy kits on eBay that will lower your bike 1 to 3 inches.

wrench or hand turn rear mono shock. Extend the shock for more resistance. Are the front forks air or gas? If they are not pushing down then the rebound is problem bottomed out , air valve on top of forks

Most rear shocks are adjustable by turning the bottom parts of the spring perch the spring is more stiff. The front forks are not adjustable.

THIS WORKS FOR AN 05 SO IT MIGHT WORK FOR THE 08.
remove the toolkit.
remove the tool kit box by removing the 3 small bolts/ screws holding it in,
This will give access to the shock.
I altered my shock yesterday.
Because there is very little space and I value all my fingers, I removed the battery and battery box. I did not remove it but I had to undo the bolts holding it in and swing it out of the way. This gives far better access to the shock and makes changing the settings easy.
I also found that it helped if the rear wheel was suspended off the ground on a bike lift, this takes the weight off the spring.

hope this helps

Looking the service manual on an 04 shows two seperate adjustment screws.  One for adjusting the rebound dampening and the other for adjusting the compression dampening of your rear shock.  The front has the same set up for each side of the fork.  (2 pistons in front and 1 in back).  If you look at the top of the rear shock on the right side of the bike, you should see an adjustment screw.  That is the compression dampening screw.  You should feel a definate click when you turn the screw to let you know how much you have changed it.  Looking toward the bottom of the shock, you should see a screw labeled RBN.  That is the rebound dampening adjustment.  I would adjust the compression dampening first and then the rebound.  Compression takes care of the initial part of the bump while the rebound slows the shock on the return to neutral.  If the rebound is set to high, you will feel like the bike is trying to toss you off the bike like a bull.  If the compression is too high, you will feel like somebody is kicking you in the arse.  
Hope this helped.  You should be able to find that 04 KX 250 service manual at: http://www.repairmanualclub.com/motomanuals/ I know you have an 06, but I'm sure it's very similar.
Good Luck

There are 2 holes at the base of the shock absorbers. Turn them clockwise for a softer drive. At factory they are setted at 3. THey go from 1 to 6.