This rear tank installs without welding over the left side number plate. It is made of composite construction and is very sturdy. No fuel pump needed. Plumbs into existing front tank and uses the main fuel pump.
We've tested it at the Tuareg Rally in Tunisia this year. According to Dottori, Marc Coma is also a happy with it (see pic).
Fits 2012-2016 KTM 450/500 XC-W and EXC models. Also fits 2013 KTM 450 XC-F.