Maybe you could get closer to the 1370 by deleting clubsport on top of paying for all the weight-saving extras. Somehow I don´t think even that would help. The cage can´t be 30 kg, I would guess about 18 to 20 kilos at most.

We might also want to remember that the new RS has a 63 litre tank as standard and a 90 litre tank as no-cost option. Naturally the weight of the fuel is going to be 90% of 63 litres, not the bigger tank.

Carpets are also an option and weigh probably 2-3 kilos together.