Thank you, castorp. If I wanted to do the same as you, where should I start? Youtube? These forums? Buy an actual manual or something? Thank you for any direction. I don't even know where to buy fork oil. I suppose a local bike shop might have it. I also wouldn't know what grease to use for the steering head bearings.For the record: my ex500 has 85k miles on it (so far). I have put 80k on myself, over the last four years. I find the front wheel bearings last around 30k, sometimes a little less. I find that it's best to change the fork oil every 12-15k, or about when I need to change the front tire. At that point I also clean and grease the steering head bearings. I do it this way in part because the maintenance schedule says something along the same lines, but mainly because I have found from repeated experience that wobbling WILL become an issue if I do not.
I just did the front end maintenance over the weekend, as it happens. It was beginning to wobble around 40mph. It's now steady as a rock.