How to Add Fork Oil
- 1). Remove the front wheel.
- 2). Remove the brake caliper and fork guards.
- 3). Pry the triple clamps apart with a small, flat screwdriver and slide the forks out.
- 4). Wipe the forks clean and set them to the side.
- 5). Take the cap off of the outer tube. Slide the tube down. Turn the fork upside down over a bucket so it can drain.
- 6). Take the fork cap off of the piston rod. Use a 17mm wrench to hold down the lock nut under the cap. Pull the spring and rebound adjuster out and wipe them with a clean rag.
- 7). Secure the bottom of the fork in a soft jaw vice.
- 8). Pull the piston rod out of the fork and continue to pull it out.
- 9). Undo the adjuster bottom of the fork tube with a 14mm Allen socket and air impact gun. The cartridge should slide out of the fork tube.
- 10
Dump the oil inside the cartridge into a pan. - 11
Clean the old oil and debris out of the inner tubes an cartridge with contact cleaner. - 12
Wait for the parts to dry. Then put the outer tube back into the vice. - 13
Put the cartridge inside the tube and tighten the compression adjuster into the fork. - 14
Stand the tube up. Insert adjuster rod and fill it with fork oil. - 15
Put the spring back in once the oil has set. - 16
Put the cap on and place it back onto the bike.
Source...