That in interesting and strange. One, that the design (which seems to work fine) would need a new arrangement. And two, that the entire assembly would need to be replaced just to address a seal leak!
SISF made a video that is quite helpful in understanding the internals of the driveshaft and final drive:https://www.youtube.com/watch?v=r213hax4D9o
and the story continues...the oring on the driveshaft for 15/16, has a hard sleeve ov the top of it, and the sleeve is apparently the problem.. i was told this was change on the 2015 c14.. kaw engineers gave .an answer to a question that was never asked...go figure...
new driveshaft and seal fixed it...ma kaw opted to change entire driveshaft because it wasn't fair to dealer to force them to buy a very expensive special tool to install the new style seal...
Yet another reason to stay with the superior older gens..
I would be interested in seeing this expensive, special tool. ?? Glad you got to the end and your shaft is not leaking anymore.... Brian
it is shown in the factory repair manual for my 2016 c14