Well it's part of the service to add a little bit of oil in there!
Easy enough to do but ideally you need a flat faced socket for the top cap.
You can also remove any spacers and see if the forks really need them fitted.
They will be made to a price and that will be as cheap as possible!
I recommend that you go on a bearing shop website and get something not made from Chinese cheese. Also buy some marine grease from eBay and fill the bearings with that.
They do need to be checked regularly if you ride in...
Find a stick somewhere near home, scrape and poke some mud off the bike, stick it in the garage, forget about it until next time you ride it.
Well that's my cleaning regime anyway 😄
Technically no.
You can do a lower leg service without touching the top end as the bottom sliding parts are not pressurised and come off as a separate unit.
But if you want to put some oil in the positive air chamber to lube the air piston, then release the air first or it will end up being...
A service centre experience.
When my forks were nearing the end of the 2 year warranty I sent them off to silverfish for a service and factory tune.
Apparently the damper shaft was faulty and I got a new one foc 👍
No factory tune though and they also came back with a faulty air shaft ☹️
Back...
Here is some interesting reading
https://singletrackworld.com/forum/topic/spring-rate-vs-compression-damping-fork-comfort-for-sustained-rocky-descents/
It's relevant to shaft speed, not how fast you are traveling.
Slow speed mainly slows down how much the fork dives when braking and it keeps the front end level when going around berms etc.
Fast compression controls how the forks react to bottoming out on landings, and multiple hits like rock...