Thanks for the info Col.
I'll have a look next time i fire up but at the moment i'm chasing a vibration problem and eliminating various potential problem areas. I have just checked the clutch and that looks good so putting that side of things back together at the mo'. Next it's take the rack off which i fitted and my Mrs reckons it vibrates like made when she's using it as a grab rail. Any way, that's another story.