Final Drive Question

[Hrvatin]

I went to change the gear oil in the final drive yesterday, (1984 R65), and found the drain plug is stripped, and noticed a small crack in the housing where the plug threads in.  Anyone out there know which housings will fit my R65? All I need is the housing, the internals are fine, (only 20,000 miles).
Any suggestions would be appreciated!
Thanks,
Ron

[montmil]

Here's a few parts microfiche resources for you. Good places to begin your research and get part numbers. Will be good fun swapping in pieces parts. You might also search for a useable final drive from a breaker.

http://www.ascycles.com/Illustrated_catalog/R65(78-85)/catalog_frameset.html

ftp://http://store.bobsbmw.com/microfiche/BrowseSeries.aspx

http://www.realoem.com/bmw/select.do?vin=6387284&part=&kind=P&arch=0

Monte

[Bob_Roller]

If and or when you remove the parts from the damaged final drive housing, you need a specialty tool to remove a nut holding the input/pinon shaft .

http://www.cycleworks.net/index.php?main_page=product_info&cPath=29_33_54&products_id=325&zenid=22ac9e72702d544554cc421b6c951402

[nhmaf]

It is not as 'simple' a swap as some might think, given the special tools involved, and that the gear assembly needs to be shimmed/fitted.  I'd expect that changing the housing that holds the gears could have wear/mfg tolerance differences that still require fitting of the gears in a new housing, even if the gears are a previously matched set.