They are the standard fitment front brake calipers for the fzs 600 and fzs 1000, the fzs1000 also has a blue dot rear caliper (which many 600 owners retrofit to their bikes as it is apparently better than the standard 600 rear caliper and is almost a direct fit, requires a small amount of fileing to the caliper bracket so that the bolts line up, they are notoriously hard to find though!).
The blue dot refers to the blue anodised piston caps.
for example this front caliper: http://www.ebay.co.uk/itm/Yamaha-FZS600-...3f0418734f
Chris
The blue dot refers to the blue anodised piston caps.

Chris