Is your bike a tokico equipped model? If so, then this is not the ideal size master for the calipers, but if it is anything like the 2016 tokico calipers i am using on a 03 zx6rr, which should be paired with a 17x18/20 master, you most likely want the 19, if you want a firm lever.
I have the Galfer superbike lines on mine. Two lines down from master cylinder wrap around forks and into caliper. The flare connection means you don't have to mess with copper washers every time the calipers come off.