This is FYI:
I am waiting for response from ZAP as to what they find wrong with my front brake Caliper. The fluid seeped out past the piston seals over a period of a month or two when I was unable to ride. By the time I was able to drive to the shop I did not have a front brake. One of the seals did not look right. ZAP requested I send the caliper to them for examination. So if you see any seepage of brake fluid take a close look at the caliper.