I'm not sure if you're being a bit snotty or not. I kind'a get that idea.
Anyway...........
1. I don't know an 'aftermarket' PN for the top bearing.
2. The '--' above is merely a cut-n-paste from the buykawi site..having nothing to do with any 'opine' of mine.
If you're pointing out #2 as a response, rebuttal or doublespeak to #1 (you list the former after the latter like it means something)..the two are not at all related.
I did wonder at the time what the 'JRRS' vs: 'JR RS' was about but again, that is simply copied directly from the buykawi site.
Methinks I repeat myself.....summore.
From this:
..I see no 'other component' that could be a seal..or that the bearings themselves look one way (sealed) or the other (not sealed). The 'cap' part on top is NOT anything like the seal that comes with the bottom bearing. It's a
dust seal is all.
Whatever anything looks like or anyone says..the bottom bearing has a seal, the top does not.
I
have gotten aftermarket tapered roller bearing upgrade kits for bikes that had a cup-n-ball bearing setup. The bottom bearings did NOT come with a seal attached to the bearing, but they DID come with a separate washer type goody that had a rubber-edge to the outer diameter. A rather worthless appendage for a dirt bike (the kits mentioned were for street machines). Maybe that has something to do with what you're looking at. You refer to a 'fiche', but maybe that's not a reference to what buykawi shows.
A further repeat...I've missed what the whole point over this is.
I've looked for the bottom bearing from someplace other than the dealer. Two bearing supply houses in town could not produce the part
with the seal.
BJH got it...but he's married to someone that works at Timken who knows an engineer there or something like that...
Mr. Wibbens: Now...maybe I don't know snotty EVERY time I see it...but I know THAT was snotty!!
Don't you have something to do??... yet another accessory you should be wiring into your WeeStrom or something?