Hi all Just trying to sort my carbs out having been running very rich for about the last 2 years. Couple of questions: The needle that comes down from the air piston one number 2 carb is slightly at an angle. There is some rubbing to one side and it looks like it's to do with how the needle is located into its holder (tab that bends to lock it in place opposed to the other one that has a pin). Does this matter? Carbs are 150 cdse. Other question is the air piston has two holes in the bottom. Which way should these be facing? Side on, engine side or otherway. Final question. The mixture is set with one of the special tools. As a guide how far down or up should I set the needles to then start the tuning of the mixture. If I can have a starting point I can then adjust from there.