Wayne does indeed have all the parts for this. To make it turn butter smooth, take it apart and run a sanding roll inside the tubular part and polish up the handle bar. When I replaced the handlebars on my 53, the throttle was stiff, as the fit was a little tight. A couple minutes with the die grinder was all it took.
If I had known this website was going to take off as much as it has, I would have taken more photos of all these little steps in my restoration to help others. I guess there is always next time.
Rick