Gear knob comes off, if its the original you may need to saw it off an fit an aftermarket one, bottom should just unclip take the staples out and use the elastic on the bottom to wrap it round. Tops usually a draw string. An yes take the old one off.

 

Left my originals on, one with three lines of stitching is your gear gaitor.
Gorgeous gaiters
Loving mine!!

 

done them now tar.

 

how did you do them im very interested in getting a set of these

 

same here!!!

 

take a pic for us