I HAVE A 2001 STOCK 400EX I AM PLANNING ON DO THE MOD IN WHICH YOU REMOVE BAFFLE DRILL HOLES IN SILENCER AND I WAS PLANNING ON HOLES IN AIR BOX
I AM AT 1123 ELEVATION
HOW BIG OF HOLES AND WHERE IN AIR BOX
WHAT JETTING SHOULD I RUN
I WAS THINKING 42 PILOT AND 155 MAIN
SOUND GOOD?
PLEASE HELP