Having a problem starting this bike which I have recently acquired. the bike has been unused for some time approx 2 years andso I suspect carbs, these have been at least partially cleaned i.e. main and pilot jets butno debris has been found in the bowl or in the jets. Haynes manual does not seem to show correct detais re ´adjustable ´ pilot needle. Quick start will allow me start the engine which then runs ok but when cold will not start without further injection. Any tips , ignition ok as coils checked out and two outer plus changed middle one I have yet to extract!