Rear drive question

[byron]

As you may have seen from my R90S thread I have just assembled the rear drive to the swinging arm and all seemed well.
Then last night I was browsing through the Clymer manual and read that I should have greased the rear coupling to the final drive with LM47. Is this really necessary as the drive shaft is in oil?
Or do I have to strip it down again and grease it- any experience?

 

[byron]

As you may have seen from my R90S thread I have just assembled the rear drive to the swinging arm and all seemed well.
Then last night I was browsing through the Clymer manual and read that I should have greased the rear coupling to the final drive with LM47. Is this really necessary as the drive shaft is in oil?
Or do I have to strip it down again and grease it- any experience?

Can no one help me with this greasey issue ?
Please

 

[B Murr]

I read this in http://www.w6rec.com/duane/bmw/finaldrive/index.htm

The final drive drives the rear wheel via a spline coupling. That coupling is prone to wear. The spline on the final drive wears more than the one on the wheel. It is recommended that both get replaced so that they start out fresh and neither can cause excessive wear on the other. While that may be the ideal solution, we seldom employed it. You should inspect, clean and lubricate them whenever the rear tire is replaced.


From that I'd say that if it is a splined coupling that you need to grease it or it will wear excessively.

 

[t_s]

Not sure if the Clymer advice was for a later Paralever driveshaft version (never owned a bike with one of those), which AFAIK don't run in oil? Otherwise the spline interface between the bevel box and rear wheel should of couse be greased. Perhaps equally important to clean both the male and female splines properly first, so one gets rid of what is left of old grinding paste (grease).

I think I remember having seen recommended that the four nuts/bolts holding the bevel box to the driveshaft should only be torqued down with the rear axle installed, to avoid any mis-alignment (rotation along the driveshaft axis?). Can anyone comment if this is sound advice?