K100RS16v leaking oil from rear drive shaft boot . Please help

[Harry Nicholson]

My 1991 K100rs16v has started to leak oil from the drive shaft rear bellows at the diff. end . The jubilee type clip was slightly loose but tightening it did not help , it still leaks . Do I have to strip the complete drive system to replace the bellows & if so are there any tips /pitfalls that could make life easier ?
Any help would be appreciated .

Cheers

Harry

 

[MikeP]

The jubilee type clip was slightly loose but tightening it did not help , it still leaks .

It isn't oil-filled like old Beemers, so you need to undo one of the gaiter clips, have a peer inside and see if you can spot the source of the oil. It will either be (down) from the gearbox output-shaft seal or (up) from the final-drive.

Check both gearbox and final-drive oil levels. If neither are low, clean the inside of the gaiter and shaft housing, re-fit the clip and then check it again after some use.

 

[Harry Nicholson]

Thanks Mike , will check this out . I wonder if the fact that I dropped the bike away from me last week when taking it off the centre stand ( the bike`s getting too heavy for me ! ) has anything to do with the leak .

Cheers

Harry

 

[Spout]

The oil could've been in there a while. Your "drop" may just have dislodged the gaitor.
It is not unknown for the seals to temporarily leak (overfilled gearbox/final drive).

As Mike says, let the oil out (you might be suprised how little is in there), clean up the gaitor and then monitor oil levels.

 

[MikeP]

( the bike`s getting too heavy for me ! ) has anything to do with the leak .

Harry,

Post some pictures of the bike, if it's too heavy (and it's a nice one), I might be able to help you out by swapping it for a nice, lightweight K75.