A history of not doing the coolant flushes will cause the water/oil pump seal to leak. Of the flushes have been non-existent, the impeller shafts will be pitted causing the entire pump to need replacing. Price, about 550.00
When the coolant is flushed, a new rad cap should be fitted each time.
Like many BMW's you'll be money ahead by doing the brake flushes on schedule as well.
I've seen the engine, trans, final go over 250k with proper maintenance.
The drivshaft can be an issue around 100k miles. We saw 2 do that. If the shaft goes, it will destroy the swingarm and possibly the final drive yoke.
Sometimes you get lucky and feel a vibration if/when the shaft goes out of synch. Do not ignore it.
Overall with good care, these will easily go 200k+ miles.
The clutch life depends on how you ride it.
Edited by Tri750 (11/16/16 09:29 PM)
1971 R75/5 roadracer
1973 Kawasaki Z1 roadracer
1976 BMW R75/6
1999 BMW R1100RT