Mikez wrote: Hadn't noticed this post till just now lol. There's alot of differences in the diagrams when you look at the two bikes. The rotor on the zn doesn't have that center hub and the mounting bracketry looks different for starters. If you go forward with it you might want to make sure it'll mount up the same.
I wouldn't expect a noticeable increase in brake performance with just a slightly bigger pad. The brake is still a single piston design. If you stayed with your current calipers you could instead use the money to get pads with better material, have new braided steel lines fabricated, and make sure that your fluid is fresh and bled of any air. At that point there should be a noticeable improvement in brake performance .
I agree with Mike:
Chances are, most 1300's have the original flimsy rubber hoses installed. There is a lot of hose flex/ expansion when the brakes are applied. (Swelling of the line)
By upgrading to braided (Teflon) lines, that should add firmness to the lever and pedal, meaning all that fluid pressure is getting to the pad's instead of bleeding into the hose.
I need to practice what I preach, my hoses are 33 years old and there is a lot of sponginess in those levers. The last bike I installed braided lines on, I was really impressed with the improved brake action.
Also consider the rotor diameter on the ZN and KZ, are they the same diameter? One may need to replace the rotor, bracket and caliper????
T.