I'm a little pissed at my dealer -- I ordered my Zero S ZF6 with the mini-cowl and windscreen, but they delivered it without one, told me that the windscreen was on "back order," then shipped me the screen a week later to install myself (I did not want to ride the bike 30 miles back to the dealer) -- and charged me for the shipping!
Anyway, first ride with the screen today, and it makes a big difference both in riding comfort at higher speeds and it seems to improve range as well. I used only one bar to get the 15 miles to work today -- admittedly, it was heavy traffic, a lot of stop and go, and I never got over 55. Usually, it is 2 or 3 bars.
Anyway, looks like you can save a bundle by buying the screen without the Zero logo -- this looks like the same screen:
http://www.twistedthrottle.com/trade/productview/5240/349/And this looks like the mounting kit:
http://www.twistedthrottle.com/trade/productview/2883/345/$99 for the screen plus $45 for the mounting kit rather than the $280 Zero is charging.
--Karl