Don't know what figures your looking at to change but the cost of fitting a GSA tank to a GS would be pretty significant!
Yes:
Fuel tank ring wrench -161021 £26.40 + vat
Fuel tank - 16-11-7-676-458 £459.58 +vat
Side Panel - 46-63-7-694-967 £34.81 + vat
Side Panel - 46-63-7-694-968 £34.81 + vat
BMW decal (2) - 51-14-2-291-869 £15.92 each + vat
Bracket – 46-63-7-673-255 £3.62 + vat
Bracket – 46-63-7-673-256 £4.81 + vat
Adventure right side cover – 46-63-7-699-717 £16.00 + vat
Adventure Sucking Pump – 16-11-7-694-106 £41.11 + vat
Bolt (2) – 06-32-7-651-211 £0.42 each + vat
Gasket – 16-11-7-677-883 £3.15 + vat
Fuel Filler Gasket - 16-11-7-654-903 £4.22 + vat
O-ring – 16-141-183-543 £1.02 + vat
Screw M5X1 (2) – 06-32-7-651-212 £0.26 each + vat
Screw M5X2 – 06-32-7-657-966 £0.25 each + vat
Screw (2) – 07-11-9-905-650 £2.51 each + vat
Rubber (2) – 46-63-7-700-744 £0.85 each + vat
Rubber Mount (2) – 16-11-7-694-114 £1.96 each + vat
Nut (3) – 46-63-7-658-638 £0.51 each + vat
One rear tank bolt metal washer £ 0.60 + vat (tbc)
Around 680.00 plus VAT?
Anyone got a second hand tank for sale?