Bonnet saved 14KG, bootlid saved 12Kg, fenders wouldn't be very much, body kit probably about 10Kg over the fibreglass equiv. rear seat 9Kg pass seat 9Kg.
I weighed mine with mick51in it (65Kg) it came up 1304Kg with half tank of fuel. Thats pretty much stock with 400r front bar which is probably a little heavier than origional + the Recaro driver seat is heavier than origional.