How To: Eclipse clutch linkage rivets
As we’ve seen before, Excelsior used a multitude of linkage rods to operate the motorbike. At the bottom of the Eclipse clutch throwout arm, there are three linkage attachments:
1. foot pedal to operate clutch
2. left handlebar to operate clutch
3. rear brake (gets pulled on after the clutch is fully loose).
The last two linkage rods attach to pivots with 3/8” riveted ends. The old pivots had worn out, so I made up several new ones on the lathe and mill. Normally rivets would clamp tight, preventing any rotation. But these need to spin, so there is a small step in the end of each rivet. This is riveted over a washer, and the pin and the washer are then free to spin in the hole in the clutch arm. A little grease helps them to spin, and a three pound sledge hammer does a quick job of peening over the metal. The photos show the rest of the story.