refoaming and resealing with a lighter density foam is a good start, scap all the useless stuff like fuel selector/extra fuel lines, every part that goes onto the ski be aware of its weight and if you can buy aftermarket or something lighter use it, remove all the heavy rubber nose/rail pieces, cut 4-5" off your handpole, grind the ribs off the sides of the inside of the hull, any excess factory glue etc, etc, basically strip your ski down to bare hull and only reinstall the necessities and find as many light parts as possible. it not rocket science. search post to see what parts people have used to lighten different aspects of there ski, a pound here and an ounce there isn't going to make a difference but when you loose it over the entire ski it all adds up and if a 12 lbs battery is noticable then so will an additional 18-20+ lbs off you hull/motor. oh buy a nice light hood too.
