Not the works spec but perhaps Clever spaceframe of clever material, small as you like fuel tank replenished by a miser and fitted with a plastic cap, plexi glass, one seat, HF style light driveshafts and discs+pads at minimum thickness with ally brake piston assemblies, opening panels minus their full frames, Magnesium wheels. Ally floor and lighter gear selection lever to mention a few things. Not wieght saving but negative front camber is a good mod. No underseal and the shell blast cleaned to minimum thickness. Some of this done to my JLG Sport with good results. Also plenty of tools/spares in the boot to aid wieght distribution!