Wilbers Zero Friction Two Stage Fork Springs F650GS Dakar '00-'07

Please note:

7wt oil is recommended for general purpose and for more dirt road riding.

10wt oil is recommended for sport-oriented street riding.

Air chamber is 150mm with springs removed and forks completely compressed.

Instructions for setting air chamber: 

1) Remove fork spring and drain old oil. 

2) Compress fork fully with spring removed.
3)  Add oil until oil level is the prescribed distance from the top of the tube - this is your air chamber.
Piston rods should be pumped several times to dispel any remaining air before final measurement is made.