Is the job very difficult?Mine was 10 years old and around 89k I think when I did it the first time (I would have to check my maint card). I thought it still rode fine and it had no leaks. I pulled the forks out and had a shop replace the seals (just for good measure), clean them up and install a heavier oil (15w). I noticed a difference the first ride. I will now do them every other year myself.
I would do it as soon as it's convenient.