Quote Originally Posted by hamishspence View Post
The EU resolved this by saying Han has a not-quite-complete backup hyperdrive on board.

So - he would have cannibalised the main hyperdrive to bring the backup one online and gotten to Bespin that way.
Backup drives also can't outrun the Empire, so even if the drive is already installed and ready to run, the Imperial fleet could beat him to his destination. Which they did anyway thanks to Boba tracking him.