The next biggest weight savings is likely to be made by swapping out rims for modern options generally, the more modern, the lighter Cheap Cigarettes Wholesale. 6-11 lbs (3-5 kgs) lighter. This thread talks about weight of rims and a 1990 FJ, as well as weight distribution.
Removing the ABS system on models equipped with it removes ___. Removing the anti-dive also saves a small amount of weight.
After that, generally swapping out anything for a modern equivalent on the bike will lighten it handlebars, to lights, to calipers, to the rear shock, forks, gauges, swingarm, you name it.
More extreme options include lighter screws, material removal, crank lightening on a lathe, frame modification/refabrication (or just drilling out holes of material) Cheap Cigarettes Outlet, subframe chopping,