I've got a potential line on a couple of mc21 bikes, with around 25,000km on them. Providing that they are currently in reasonable running condition right now, and assuming they have not recently been rebuilt or anything, what kind of parts should I expect to need to replace?
I see a lot of talk of crank bearings, what's life expectancy on those? Is that the only real area of concern in the bottom end?

thanks!
_________________
n00b