0660.41.300 (066041300) Replaces 0797.41.308 (079741308) from Darmah and 900 SS.
This is an aftermarket replacement 12mm rear brake master cylinder with 50mm center to center mounting holes.
12mm is the PERFECT size for a single F08 caliper which we have proven to be the case on all the front single F08 caliper applications such as 750GT, 750 Sport, 860 GT etc. So, this will be a definite improvement on the bevel drive 900 Super Sports & Darmahs. Do know that originally the SS and Darmah utilized a 15mm master cylinder which in my opinion is WAY too large and too stiff for a single F08 caliper so....... There ya go.