I have my machine jetted real close for winter.I will be removing the lid and useing a lightly oiled filter,+7 timing and 110 race gas for the drags.My question is .....how much will I have to richen the main?Will the needle be fine?I won't be on the needle at all dragging,so I'm thinking it should be just fine.I have my largest mains in which is 165.I have to buy jets so I want to narrow it down the best I can.