Howdy. Banjo fittings & banjo bolts are kind of universal for KZs (10mm). The block at the forks is the brake joint or brake line joint. For any brake line figure out the needed length beforehand; then verify the length of the donor brake line. maybe the 650D will work, maybe not, but I would
not install used. I went with Goodridge brake lines & fittings from Z1Ent, but there are other options. CycleBrakes.com has complete Gaffer brake lines w the banjo fittings already crimped on. With Goodridge you have to install the fittings, but it's no big deal, easy.
If the forks seem too firm from the extra preload, you could swap out the top fork spacers with shorter homemade spacers.
3/4" pvc pipe is the same outside diameter (~25mm O.D.) ps: I have the same motorcycle.
Banjo fitting. connects to brake line (
the stock banjo fittings are crimped onto the lines).
www.z1enterprises.com/brake-hose-10mm-st...50-H1+650+CSR%2F1981
Banjo bolt. as the name implies, it looks like a bolt. aka oil bolt.
www.z1enterprises.com/brake-hose-10mmx10...50-H1+650+CSR%2F1981