Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Ash, what is the part number in the Japanese parts book?
Like you Ash and Rob62, I don't understand why they've specified a strange bearing there.Ordinarily you'd guess the reasons for change would be chasing load capacity and/or durability. But why a paired roller? I'm at a loss to see a rational path to that design. Must be something we're missing, I don't recall seeing another of that type though across many different applications. They have plenty of things to play with in shifting roller number and size, but why pair them?On a slightly different, but related note, just going through some old bike magazines and CMM March 2011 has a picture of a proud 400 Four owner, is that you Ash? Nigel.