What size jets do you guys recommend for a stock internal 12A with the racing beat header, presilencer, muffler, and a Mikuni carb? I really don't know anything about jets and not much about carbs so any help would be great. Carb will be on a wrap around manifold. I guess the carb is a 44 something. I'm such a nub.

 

jetting Reccomendations for a stock port 12A with header as published by Mikuni USA back in the 80's

Venturi: 39mm
Pilot: 62.5
Air: 240
Fuel: 200