It shouldn't be that heavy. But who cares how heavy it is if it's your kicking-around bike?

What you should do is tear it all down, keeping careful track of the parts, and re-grease the bottom bracket and the wheel hubs. Get all the rust off the aluminum parts while they're off the bike. Get new cables (and housing) if needed.

You may need a BB tool, or you can take it to your LBS and they can loosen it up for you.

For rust on aluminum parts I used wood bleach (oxalic acid from the hardware store). It's powdered. It takes less than a tablespoon per gallon of water (I just guess and don't mix it too strong). Soak the parts for a little while. If they're really rusty, maybe overnight. The rust will just rub right off. Don't leave the parts in the solution longer than necessary. Rub it off, dry them off, then put a little chrome polish on them.

I don't know what to do about superficial rust on the frame, but I'm about to find out with the Centurion Elite I'm about to start on.

I completely rebuilt the RD on my son's John Deere, because it had rust inside. While I was taking it apart I took pictures of each step with the digital, so I would have a reference for putting it back together. I wish he had done that when he was taking the rest of the bike apart, but we didn't think of it. It helps to know for sure what order the washers, etc., go in.

I wish someone would clean up the bike garage floor so I could get started on the Centurion. It's the only thing holding me back!

Karen