These have all been dismantled as described earlier and fitted with new needle-roller bearings. The little scoop on the end of the bearing pin catches oil and any other debris that happens to fall down the cam chain tunnel and therefore becomes a reservoir for dirt and moisture.
I spent a therapeutic hour sorting through the bits and assembling a few parts. There were two good early types so I made sure those went together first.
Then put a few later types together to keep subsequent projects fed.
All these have had their wheels re-trued and the bearing replaced. The pin is held in with a short M7 bold secured by high-strength retainer.
Just to make sure, I offered up one of the early style parts to my 1961 CB72 engine and it cleared the tunnel properly. It is important to thin down the bolt head on the toller fixing or the tensioner will foul the tunnel.
G
