did a quick search around. the plastic had a tendency to crack. and all that streamlining vented engine heat directly at the rider. plus it had the typicla BMW problem of being way overpriced to begin with.
i see them for sale all the time. maybe it's just the same couple changing hands again and again. many are low mile garage queens. considering that a garden variety K100 is going for three thousand, interesting that these can be had for five or less.
friend in school had a K100RT. beautiful bike in it's day