In reply to cb294:
Not sure it's that weird. Look at the mechanic cam videos from the big crash at the tour and there's all sorts of swapping of bikes, between riders, between team cars... Teams have multiple vehicles, and I can see the sense in getting rid of a broken bike if only to prevent it accidentally being grabbed and given to a rider needing a new bike. I can't say I look ulout for it, but I don't recall seeing a team car cross the line with a broken bike..I suspect most teams have vans for supplying feed stations and picking up discarded items of clothing and broken bikes following at some point behind the race.
I also don't speak Spanish well enough to know if the translation you give is remotely accurate. This strikes me as a bit like the "look at that wheel moving by itself" arguments made last year.
I'm comfortable that the uci and other riders would spot e doping a mile off, and if it was really a problem we would see the whole peleton or at least the whole of an offending team stopping to change bikes to hide their motors which isn't very conductive to a competitive edge is it?