nathan cubes,even if the handlebars were bent it would handle exactly the same as it would with straight ones.the handlebars would just be out of line with the forks , the headrace bearings will only make it handle badly if they are centralising due to a worn race and/or stiff and corroded bearings.... BUT as he has explained ift has been handling bad since an accident so it therefore must be either the forks or steering stem or even the frame that is bent.please try to make sure you know what you are telling people is right as you will mislead them and cost them time and money with ill advise.
adam bike doctor (by trade) 27 years experience with papers
September 2006