I replaced my shafts with some cold rolled heavy wall tubing 3/4" in dia. because the originals were very worn. I then bought some bronze bushings, 7/8"x 3/4"x 1 1/2" long, drilled out my pedals to 7/8", inserted the bushings with JB Weld, trimmed the ends of the bushing, then drilled and tapped a hole in each of them for a small threaded grease fitting. Assembled, greased, good to go.
Brian
