Dunno if anyone can help, but i've finally decided to get off my arse and start sorting my MC21.

The head race bearings were very notchy, so i've taken it apart and found the races in the frame are in a bit of a state. I've looked at the online parts manual and found the part #s for the bearings and the 'other bit the bearing races against'...



#4 and #5

But I can't seem to find the part #s for the ones in the frame?

Any ideas?