Hi there Thanks for the reply. The engine is modified its a 1200 bandit with a ported gsxr 750 dot head and cams. It's also got an ignition advancer and dyna 2000 ingnition with dyna coils and leads. I have a set of bst38ss carbs that have standard needles with clip in second groove from top float levels are set to standard level 14.6. They have 42.5 pilot jet and all seals etc have been changed and the needles, emulsion tubes, float valves and seats were replaced around 500-800 miles ago. As above pilot screw is 2 turns out.