Snowmobiles; supports for placing material on snowmobiles, namely, storage racks and storage boxes specially adapted for snowmobiles; detachable fuel tanks specifically designed for use with snowmobiles; hand protectors attached to snowmobiles, namely, protective handle bar grip guards specifically designed to be attached to snowmobile handlebars; fitted snowmobile covers; gasoline engines for snowmobiles; luggage carriers for vehicles; luggage racks for snowmobiles; trailer hitches