Are you using the original 3/8" CEI adjuster into the original gear box inner cover?If so, you need an extra 1/2'' or so of inner free length.Also, an extra split feral ferrule immediately outboard of this makes cable fitment easy,allow another1/4'' for this.Set up the clutch and the actuating arm as per Riders' Handbook and then carefully grind away your outer cable to achieve Nirvana.Make sure your actuating arm is not installed arsy-tarsy the top of same should be visible through the inspection cap.When everything is working do write and share your mensuration.The grinding needs to be done cleverly-Mole Grips help.I pity the Club Spares folk;almost any Burman clutch/gearbox has been re-fettled over the last 50-odd years