I posted a while back about the size of the ST4 Radiator size and got the measurements of 330-350 x 200 (ish). Could someone please check that is the complete radiator size including the header tanks or just the core only. If it like my S4R, the header tanks 'should' be 35mm wide each making a total rad width of 420mm. If so then it is more than likely the same radiator used across the range which sort of scuppers the plans to make the radiator smaller.