Mmmmmm the smell of castrol r
...is that oil still about? I did a season of karting quite a few years ago and didn't mind following the pack ( as was often the case) just for the pungent whiff of the stuff
As Griff has said moto x bikes can be an absolute money pit,from my experience anyway,be it wether they are old or fairly new
Just common sense really, if you do get another bike from a racer just make sure it's been kept up to good condition suspension & engine wise.