I have a stock port, stock stroke .5mil over bore shee. Its got Lrd adjustable pipes, vf3's, pods, chariot plate on +4, coolhead with 19cc domes, stock carbs. Im currently jetted 320 main with 27.50 pilot 1 3/4 turns out on the air screws with stock needles. Do I need to change my needles for better performance or are the oe needles fine.