Both of mine were Beemers. Maybe I was spoiled, my first two BMW's (both bought new) were K75's and gave excellent service. I was left on the side of the road once with a K75, but the quick fix was simple and the permanant fix took just a few minutes. That was the only problem in 92K of riding them.
My '93 R100RT and '93 K1100RS weren't as reliable, but I did buy both used with 30K and 15K respectively.
The RT had the rear clutch splines disintegrate at 36K, left me stranded on I20, at midnight. Totally rusted out is what the mechanic told me, most likely stored near a salt water environment was his opinion
. $$$ to fix it. Sold to someone in Ohio
The RS had to have the clutch and all the other clutch parts replaced at 31K. The shop told me the adjustment nut was screwed all the way in, this from the last owner. I'd always kept the clutch properly adjusted at the lever. Never thought check at the actuating arm (which rarely needs adjustment), so I take some blame for that. Again ponied up the $$$ to fix that. A month later the ABS went south, front modulator failed. $1,900 for a new one (of two)
Exactly one year later the fuel pump went out (34K). Kept it for 2+ more years (w/o ABS) and it now resides in California with it's new owner.
I'm not soured on Beemers, a nice Airhead would still get my attention (no more Bricks). I hate that I had to pass up two I really wanted. A low mileage '74 R75/6 and an '84 R100RS. But I'll stick to my Bandit and Sprint for now.