Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
Honda 42313-390-000 - COLLAR, RR. BRAKE PANEL SIDE (NOT AVAILABLE) Not Available. This OEM part is guaranteed by Honda's limited part ...
So I ordered a 4231-3390-000 from DSS. It's arrived in an already open small Honda parts bag and its 51mm wide. So I'm poorer financially but no better off in sorting my rear axle
I've fitted an earlier wheel and brake plate to my K3 and need the 44mm collar to fit the wheel correctly.