Having some glitches with my bobber build. I'm running a dual rear caliper setup. I had to replace the pads on the ultima calipers with new ebc pads after one caliper fell off...
I had to buy a new rotor also. So now with all that, i put it back together but the new pads are tight on the rotor. The ebc's def were thicker than the ultima's. Is it ok to run the bike alittle at a time to wear the pads down? As long as i don't cook the rotor?
I don't have the brake lines hooked up yet also. If that matters. Pistons r pushed all the way back in

Also what is the size of the banjo bolt copper washers for Harley's?

 

Not sure on the copper washer size. I bought an assortment of them at the local auto parts store and one fit.

I would not run it with the rear brake dragging. It will cook the whole system in a short amount of time. If the pads are too thick, I would go with grind them down a bit.

 

 

Nope don't run it with the pads dragging . As they heat up....and they will. It will get even worse. Have someone take a few thousands off Pistons if u have room. Or mill the back of pads to use EBC pads. Just make sure calipers are centered on rotors

 

The ultima calipers I have use a 3/8 NF banjo bolt. This is on the 4-piston calipers.
You could take the banjo bolt to you local parts source and get the proper washers.

I would not run the brakes tight like that. You stand a good chance of smoking the rotor, and pads. You say the pads are thicker than the originals, and you have the pistons pushed in all the way. In that case, I would use a flat surface with a sheet of sand paper to take a slight bit off those pads. The friction surface will cut fairly easy with with the proper grit paper. Its easy enough to do this, and your not trying to mod the pistons or the metal backing plate of the pads.

 

I stripped it down and found one caliper would come off while the other one was tight to the rotor. I'm just bailing on this dual rear brake thing. It's been nothing but a pain. I only did it cause originally I wasn't using a front brake on the build. But since I have one....

 

Two calipers on the back is no substitute for having a front brake...the front does the majority of braking because of weight transfer. Two on the back is a total waste of time, because you can easily lock the rear wheel with one.

 

 

Smart move there........

I would never, ever own one off these without a front brake......