A few weeks ago I sent my CB750 swingarm out to get rebuilt and modified by Hondaman. These swingarms were notoriously bad at staying lubricated and were known to fail and ovalize. Well, he worked his magic. He adapted a '74 swing arm bolt to work with it. The '74 and earlier bolts have zirks on both ends to feed grease, the '76 only had one. He also machined a new collar with better oil channels. Guaranteed for life!