Hi,
Please help me, I've been in a hassle for a while and I have no clue!

I want to upgrade my stock breaking system on my 2009 sportster 883 iron, Please let me know what is needed to place 4 piston caliper and breaks front & rear.

What is needed to place them, I knew from PM that I have to change the stock handle bar master cylinder and he*recommend a*9/16*bore master, for my bike
So whats the PN? And I already have the fuel gauge indicator , will it still fit on the new master cylinder or it's a waste now?

Front caliper in contrast cut #0053-2919-BM
Rear caliper kit #1293-0052-BM

Thanks