Hopefully you have some good tires. You can adjust the pressure of the tires to change handling. You can also slide the forks up in the triples a few mm or change the viscosity of the fork oil. If you haven't ever changed the fork oil - you should.
Good resource if you haven't noticed the sticky:
http://www.crfsonly.com/forum/viewtopic.php?t=13507
This is from Motorsports Tech Report. Should give you a good idea where to start. I haven't added the oil etc. Was able to get a good feel from playing with the clickers and adjusting the sag along with tire pressure.
Shock - Set rider sag at 100mm, rider with full riding gear on.
http://www.shocktherapyracing.com/sagsettings.htm
Fork - Add 3cc of fork oil to each leg, this raises front end ride height.
You can add this fluid through the fork bleeder valve!
Check your manual for the proper weight oil.
Fork settings Compression (top): leave at stock setting (set at 14 clicks out) 14 clicks out is stock
Rebound (bottom): 1 click out (softer/faster) from stock (set at 8 out), if you don't like it try 7. 7 clicks out is stock
. . .
Shock settings Compression (top): 1 click in from stock (1 click +, more stiff)
- 1 click clockwise from stock punch marks. Our bike:
set at 8 out, 9 is stock.
Rebound (bottom): 1/2 to 1 click out from stock (-, more soft/faster)
1/2 to 1 click counter clockwise past punch marks.
Our bike felt dead in the back at one full click past stock and too fast a rebound (kicking in the back) at the stock setting. It felt nearly ideal at 1/2 turn softer than stock. Small adjustments make a huge difference on this bike - you can go 1/2 turns. Our bike:
set at 14 1/2 out, stock 14 out.
High speed compression: Leave stock Match marks
Shock setting notes: Do not use the number of clicks for the shock adjustment, instead make changes from stock position. All shocks are dyno tested and then set with punch marks for the correct stock position - the number of clicks may not match!!!
In is clockwise (full hard), out is counter clockwise (full soft).
Your results may vary
'06 CRF450X; '07 CRF230F; '03 CRF230F; '03 XR100R; '03 XR70F; '79 KZ1300 A-1; '71 SL350 K1