I figured out why the right fork on my Wife's '14 WR450F is leaking.
I already tried the business card under the seal trick once and it didn't work so I did it again and took a closer look at the offending fork tube. I found a miniscule nick/burr/sliver kind of thing on the rear insideish area. I didn't want to do anything stupid like take after it with steel wool or anything so I ever-so-carefully took my pocket knife and gradually moved it back and forth with it starting flat and slowly rotating the edge closer until it just caught the little burr. It came right off but I'm afraid the damage is already done to the fork seal. I'll see if it is still leaking this weekend and if it isn't, then no problem, if it does then I'll change the seals on that side. Question; with the VERY small nick that was in there, that is now gone, you can't even feel it, is it even possible that it MIGHT not leak with a new seal in there? Someone that has had something similar happen will have to answer 'cuz anyone else would only be guessing. If that fork leg is trashed, can it be reconditioned? Maybe some of that fancy pants stiction reducing coating stuff? If not, are the stock units spendy enough to just skip to the top tier forks, Ohlins etc.? The reason I ask is that I have been rather unpleasantly surprised with the price of stock replacement parts on my other bikes.