I had a little crash (highsided) and knocked my handlebars out of alignment. I tried knocking them back in putting the front tire against a brick wall and slamming bars in opposite direction but it didn't budge If I loosen the steering stem nut can I then re-align the bars? or is there more to it?
Maybe you already checked, but the little rubber dampers in the upper clamp get tweaked most of the time and cause the bars to be crooked. I just turn the bars to one stop and either twist them by hand, or "gently" wang on 'em with a 3 pound hammer. Supposedly swapping over to a one-piece handlebar clamp helps keep this from happening.
Same here. Once in a while I had to completely take the rubber cones out and put them back in. Since I got a different bar mount, it hasn't happened anymore. The tweeked forks is a definite possibility, but it never was my problem. It was always those darn rubber mounts.