I know that there are different methods of changing your pilot without having to pull the carb and it can't be rotated enough - Cut off or bent screwdrivers etc...Here's one to try, if you haven't already. Use a 1" section from a 4mm allen key and grind the end to a flat blade, so that it is a 'nice' fit in your pilot jet. Take a piece of shrink-wrap and slide it onto the allen(hex) key, leaving about 1/8" past the ground end. Take a pilot jet, smear some silicone grease on the end and insert it into the shrink wrap so that it 'engages' with the flat blade - and heat it. The jet will slip out easily to leave you with your tool. Use a 1/4" ratchet with a 4mm socket for easy installation & removal thru' the 17mm nut on the carb bowl. Remember - Don't go mad when tightening - finger tight, then 1/8 of a turn.