When you own/race/ride a bike for 7 years (and my son's for 1/2 that), you do get to know a few things. Having four other friends/aquantances which own(ed) and raced the same model does help, although they never did much work on theirs and treated them like XRs. I also followed the Suzuki Off-Road team in the early to mid '90s, even though I wasn't riding then. Add to that all the articles I found from the US, Aussie, NZ and England, it does add up to quite a bit of literature - different ideas to experiment with.
There may never be another bike in my future that will deliver so much satisfaction per dollar and required so little maintenance, IMHO. Sure: I did lose a bottom end to a broken spark plug electrode, requiring a tow; and another time the countershaft bearing wore out from year after year of empacted mud. Otherwise, it was tires, grease, and a top end every year.