Master cylinder swap

Kitten tooth, m357..

I want to put duals on my440..(habit from rocket not to have to use the rear.. And track days:)

Can u guys tell me what size forks from your bikes? I'm trying to figure if I need to swap forks or can I just add a disk to my rim and forks..

if your forks have the mounting bosses on them just use your forks

I have added a second disc on my KZ900 and KZ650 without changing the master cylinder. I did add braided steel lines to both. The 900 is a little mushy but not bad, and the 650 stops on a dime with very small lever movement. I have considered getting a 650 master for the 900. A side benefit of doing that is the braked light switch is incorperated in the 650 mc. I lost the front brakelight swicth on the 900 because it was located in the crossover that was eliminated with the braided lines.

When I bought my bike it had one of those on it and it never had enough brake no matter how much I bled it so I swapped it for one off of a CBR 600F4i and it's like night and day difference