HI I AM NEW TO THIS SO BARE WITH ME PLEASE.I JUST BOUGHT A 2003 400EX I AM PUTTING A LRD PRO4 SLIP ON AND A NEW HONDA 450R CARB I NEED TO KNOW HOW TO JET THE CARB WHERE TO SET THE NEEDLE AIR BOX LID YES/NO WHAT MAIN JET AND PILOT ALSO WHAT DO U ALL THINK ABOUT A 16 TOOTH FRNT SPROKET?