The YZ 250 was finally overhauled by Yami.
EFI and major chassis redesign (following the 450F). Anybody ride one yet?
I suspect the WR250F, which does not have a 2014 model will be overhauled for 2015 with EFI. Unless it was discontinued?
http://www.yamahamotorsports.com/sport/products/modelhome/12/0/home.aspx
The future is EFI, jetting carbs will be a lost art.