I have lost my spacer that sits inside the final drive (diff) that the rear wheel relies upon for my XJ900... I do have the spacers to suit a XJ750 but looking at parts lists and actually testing it out it seems to be much longer than the XJ900 version would be. Any chance someone has one lying about and can do a metric (or otherwise) measurement for me? Thanks! I've attached a pic of the bit I mean also.