I just sourced new rear KLR bearings (fully sealed) from BC bearing and paid for the high zoot ones, got home and removed the outside seal and there was so little grease there I had to make a call, a lengthy discussion with the bearing pros. as to why after paying the big bucks so little grease is used , the reason is that when jammed full o' grease the balls slide (bad), rather than roll, and the packed grease serves well (bad) to retain any heat generated by the bearing, sealed bearings are supposed to be just that, sealed and therefore mere thousandths of a squeek of grease is perfect to lubricate the bearing surface for life, and that machines even MORE advanced than the KLR have running speeds and changeout intervals far exceeding even the most enthusiastic rider.
Personally, I popped the seal (outside) added some grease, replaced the seal, and after assembly greased the face of the seal (to seal it), I've added two layers of grease for crud to get thru, I'm relying on the extra bucks I spent to prove itself, I'll let you know in another 56thou K.
and for the record, I replaced these because I wuz a bozo and crammed dirt and gravel into the face of the sprocket side bearing, that being said, I would've never changed em because the spartan amount of factory grease looked new, and as if just put it.
Also for the record, I would rather have rolling balls than sliding balls any day.
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