Oil sight glass change

[Fazerider]

Just to correct an error, the sight glass is listed as a spare part  4H7-15361-00,

You could always drop the sump as you should be able to clean it from there.
If it is that bad it might be worth cleaning the sump pan and pick up screen while you at it..

I stand corrected. Forgot the sight glass was mounted on the crankcase rather than the cover so looked in the wrong place on AJ Sutton's website!
I also can't swear as to whether I cleaned it via the side with the clutch removed or from underneath when I had the sump off.