I'd use caution with carb cleaner on brake parts.
Some carb cleaners contain petroleum products or solvents... I know nothing of the chemical composition of FJR brake parts, but I have seen petroleum products, accidentally put in automotive braking systems, destroy seals, cover gaskets and boots.
While carb cleaner does evaporate very quickly, I would worry It could cause premature degradation of the rubber parts. Carb cleaner is made to break down petroleum residue...rubber is petroleum based. I wonder about the pad lining glue too?
This is just my opinion, I am not stating any facts... in fact, if anyone here is a chemist... I'd love to know more.
(I do admit to using brakleen on everything... except carbs and TB's of course)