Update#3 got the bike this afternoon, it's now running perfectly having had the correct needles fitted, it's been a long haul but sorted eventually, work completed: Valve shims 2 x new coils Carbs ultra sonically cleaned (twice) Correct carb needles fitted along with the correct main jets. Dyno tested to ensure correct fuelling etc I can't speak highly enough about the shop, many would have chased me but Dave persisted to sort everything, costs were incredibly fair. May I recommend : BDS Motorcycles of North Shields.