[KeefyB]

Yeah the small tank is a pain,especially on long distances.I guess the 749R tank will bolt straight on.Gawd knows how much it would cost tho.Gotta be in the region of 800 quid,then theres the fuel pump and filter plate,etc!
DP do a carbon on that holds "over 20 litres".No good for the magnetic tank bag tho.Again the price could be an issue.
You could always get a gallon can and stick it in the tank bag!