V50 drive box oil leak

[colebrooker]

I have been using this bike for 7 years and it has recently started dropping oil onto the disc brake and wheel rim/tyre.
The air vent was clear, the box split and the crown wheel assembly taken to a main dealer for the oil seals to be replaced. Refilled to the level of the horizontal plug with 85/140 oil supplied by dealer. It was ok after a 40mile gentle ride with pillion pasenger but next ride up to about 60mph it was just as bad as before. Oil over disc and wheel. I now have it apart again and can see nothing wrong. I have never put the moly additive in. Any suggestions please. I am going away for a couple of weeks so may not respond for a while. Thanks

[john zibell]

Something is causing the seal or gasket to fail. I suggest giving the dealer the complete rear drive and have them look for any problems where the seal may ride or gaskets mate to halves.

[Holt]

And as always; check the vent plug. A clogged can cause blowen seals.

[MalcNZ]

how did you get on with the leak? As you see from my recent listing you are not the only one with oil on the brake syndrome.