Im running 40 pilot and 200 main on stock carb.I have boysen rad valve fmf and silencer ,kn filter,Head shaved .20.bored 69mm with some porting.Im at 2000 above sea level and ride up to 4,300 feet also the temp has been way below 30.What is your temp and sea level i might be able to help you out a little better to get you in a safe ball bark so you can get it right.