I am also restoring a CX500 that was stored. The carbs were a big issue, but the rusted gas tank was a Bigger issue! I also am doing the tires, battery, front disk brake rebuild and the master cylinder. Become friends with e-bay. That is were I got most of my stuff. A local cycle shop is installing a set of Dunlaps for about $210. That insludes mounting and ballancing. Got a gel cell, a bit more pricey, at Batteries Plus. They actually had the best price, so give them a shot.
Good luck and keep us posted.
Good luck and keep us posted.