a nice picture full guide to a general service of the boxxers i wrote last year.
In regards to the damper, its a bit more involved and I wouldn't go there if you don't feel confident. Start off by removing the gold piston by removing the nut holding it on, then you can pull the shim stack, black preload rod and spring off. Now if you can identify where its being bunged up here and sort it, thats great, because the next step is a ball ache.
You need to prise the two c clips off that hold the detent bearings in place, remove the internal circlip thats under where the dials are and pull everything apart and clean it all up.
It should look something like:
Edit just saw you already linked my page
Let me know if you need any more help/pictures