Hi all,i managed to get the pilot jets pulled tho it took quite a bit of twisting with standard straight pliers,they were totally caked with hard crude,had to soak in carb cleaner and careful use of wire strand from a cycle brake cable,set the float heights to exactly to 1,5cm,put them together and although not overflowing,they ARE leaking fuel,another strip down showed all 4 float chamber seals are squashed flat almost the whole way round,may be able to prise out and clean,turn over and reinstall,failing that they will need replaced.Fuel hitting plugs 1-3 with 1 flooding,no fuel at 4 and 3 spitting back thru carb so suspect valves not seating which is todays job! Thanks for all the relys and input guys!