TOPIC:

Wondering if anyone had any comment as to the quality of the calipers Z1 Enterprises has for $97?  A caliper rebuild kit is $167 and didn't look like it included the piston, another $31. The original of course will accompany the bike to it's new future owner in case they are a purist.. I bought a Chinese master cylinder for my KZ750E and have been satisfied with it. 

Mike

Brake masters has a rebuild kit for much less!  
Don't know about the repo calipers just an FYI 

I was thinking of buying that one for my Dad's Z1.  I asked Z1E who made the one they carry.  Here is the response.

We have them manufactured by the Kailing Group, a well-respected company that reproduces calipers for some of the top brands around the world.
They are a quality, reproduction of the stock Z1 caliper.

I also found two different versions listed on Webike.  One from PMC and one from M-TEC.  

japan.webike.net/products/24045534.html
japan.webike.net/products/1523062.html

These are a lot more expensive, but I couldn't really convince myself that they were any different than the Z1E reproduction.  If there were a way to confirm they were made in Japan, maybe I'd consider it.

In the end I just rebuilt the stock caliper with a new piston and seals from Z1 Enterprises.  I got the stainless piston (PM81-3141).  But that seal kit (Z1CALKIT) is stupid expensive.  What the heck?

Does Brakecrafters have a rebuild kit?  I can't find one listed on their site.

If Brakecrafters doesn’t list the rebuild kit on their site, call Mark with the component in hand and a caliper. He'll get you a set from the dimensions you give him.

Thanks for the replies DOHC and Blipco!  I got my caliper disassembled and the piston and bore are in surprisingly good condition, I found the "B4" date code on the bottom, I'm very sure it is original to the bike, looks to be worth a rebuild. It will go the same route as the rest of the bike, clean, functional, but not showroom pretty. That will be for the next owner!

MIke