Revove the carb. Pull the diaphragm cover carefully by remvoing the screws. Check the button on the diaphram is engaged with the cover by lifiting one edge of the cover and sneaking a peak. Slide the cover away from the screw. Note how high the body of the needle is compared to the body of the carb. Adjust to sit even with the carb body by carefully bending the fork. Replace cobver and test run.