I had a 1979 BMW R100RS for 12 years, and it was a horrible thing, vibey, poor handling, terrible electrics, hard to start, etc etc. I think those URinALS are a better copy than a lot of people give them credit for, ha ha!
Oh, why did I keep it so long you ask? Well I bought it for $5500.00, then spent another $4400.00 to get the engine and gearbox rebuilt, (those Mahle Pistons were $500.00 a pair back in 1992!) then I replaced the terrible front forks with later models, the #$%*e-ful ATE calipers with Brembo's, the worn out discs with new cast iron items, etc etc.
Total cost was way over $12000.00 for a bike that was worth about $5500.00, so I kept it as long as I could bear it, just so I could get some of my money back. When some fool offered me $4000.00 last year I couldn't get shot of it quick enough, I've owned a K100RT and it was a great bike, but that old air cooled boxer was just a pig. Cheers, Terry.