Taking the time to fiddle with your dirt bike suspension settings can dramatically alter the handling and performance of your motorbike over different terrain.
Today's modern bikes come with adjustable suspension that is set up so any monkey can throw a screwdriver or spanner at it, and make a noticeable difference to the way it functions.
The quality you need to bring to the table is patience. Merely little adjustments must be made, individually. Then you'll need to ride over the same track or trail to experience the difference every modest change makes.
THE FRONT FORKS
On the top of the fork you will find a screw (or clicker). Next to it will have the writing S - H, meaning Soft and Hard. This is the compression adjuster. Although in some situations this can be found around the base of the fork - check your bike handbook.
Should you wind the screw in to the 'H' (clockwise) the downward action of the fork will harden. Alternatively, in case you wind the clicker out (counter-clockwise) the fork will become softer.
To get a good feel for the difference this will make, try winding the two clickers completely in, then go for a ride. Don't try to set any new records though... When you have a good feel for that, try winding the clickers completely out and compare the difference.
Make sure that you don't leave them set on extreme hard, other than to get a better understanding of how it affects the bike. Long-term it ain't good for the forks.
Now, on the bottom part of the fork you'll find the rebound adjuster. This determines just how fast the fork returns to its extended position after being compressed. Screwing the clicker in toward 'Hard' will slow the rebound speed down making it better for bigger, rolling terrain or holes and bumps.
Screwing the rebound adjuster out to 'Soft' will increase the rebound speed making it better for small, rougher bumps.
NOTE:
After some time the forks suck in air creating a build-up that interferes with the overall performance of any dirt bike suspension. Undo the air bleed screw on the top of the fork to release this air. Ensure that you do this with the weight off the front forks and be sure to tighten it back up before placing the bike back on the ground.
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Now that you have adjusted the dirt bike suspension you can move on to making other adjustments to imrpove your bikes performance.