IS your old Caliper Piston as Rusty as a local light pole?
If so, then you may be interested in my New hand machined Stainless steel caliper piston- and this will solve all the binding brake issues that you have with your CB750 Honda.
Your old ones get as crusty as a Grandma's feet, and the probably work as well too?
But I have now machined these stainless steel pistons to stop all that dilema and now you can have a smooth operating front brake system on your inline four.
Many will know what I am talking about, when you go to move your old 750 that has been sat for some time and the bloody brake wont release fully.
That;s because the piston is dragging from the rust pitts on the piston and cannot release, unless you wack the Caliper with a rubber mallet, block of wood or boot the crap out of it with your shoe.