I'm piecing together my absolute favorite bike of all time--a 1980 kz1000 ltd. I got the bike from a local shop (Ron's, Tulsa) in non-running *mostly* complete condition. I built one good rear caliper from 3 incomplete ones in their salvage stock (see pics). From what I can tell it's the correct caliper for the year/model.
Problem is it won't fit over the 7mm thick rotor on the rear wheel. Pistons are fully depressed, I think--they're clean and lubed, and pressed to bottom easily by hand. Pads are EBC FA 36.
Is it possible I have the wrong caliper? Were there different calipers that looked very similar in those years?
Is it possible the rear rotor was supposed to be a different thickness? Like maybe someone swapped an A model rear wheel in? Grasping at straws I know.
SWest wrote: Did you try a C clamp to be sure they're bottomed?
I did. They wouldn't budge and were both seated at identical depths relative to the bore face in the caliper.
After that I took the pistons back out and gauged the depth of the bores, height of the pistons and pads, then figured the assembled clearances to confirm they should yield about a 6mm gap between the pads. Which is what I'm actually measuring assembled.
hardrockminer wrote: You picked a great model for your favourite bike. I have one as well.
Your brake looks to be correct but not all there. I've attached a photo I took of mine from 5 years ago during a rebuild. Notice the wires on top.
Front and rear discs are different thickness. I think rear is thicker, but the manual will tell you what the spec is.
Thanks man! An '80 1000b was my first bike. Kinda biased.
I did notice I'm missing the spring clips, which is the only difference I'm seeing by the pic and the part diagram. But it shouldn't affect the gap between the pads (assuming they're manually pressed apart), unless I really misunderstand something...? My only manual is the Clymer, which is somewhat cheesy for 1979-80. It mentions 6mm as a general minimum for all years single rotors, but doesn't specify front or rear, and barely addresses brakes at all in the 1979-80 addendum. Probably right, but uncertain enough I still thought worth investigating.
The part number I get is 43082-1002. That comes from the Kawasaki site and from Partzilla. The number is the same for the A4 and the B4. I am now wondering if you have pads for a front brake. The rotor is thinner on dual discs so the pads would possibly be thicker?
I ride Z1's. I have a couple of '75's, plus an '80 KZ1000LTD. My lovely Sweetums rids a 1981 KZ550.