There's a trick to lifting a hefty bike by yourself, I've not tried it on anything heavier than 600lbs but it supposedly even works for the 800lb+ tugboats.
This is true. I can lift my 750lb bike with relative ease, and even Eileen lifted it I think. Once I actually wrenched it upright again by the handlebars, but I was pretty mad at the time and probably injured my shoulder a little in the process.