Thanks for the replies.
I have come from Honda and have used Fowlers for spares . They do the exploded diagrams that i find useful for seeing how things fit together etc and ordering parts. I was thinking that there would be equivalent for BMW but it appears that BMW have the parts supply to themselves. Thats not a problem, I can order from my dealer that supplied bike and the parts diagrams will tell me what I need to know, how things fit and part numbers. happy bunny.