i have a 2000 blaster and i currently run a racing carb and i dont like the way it runs so for the time being i am putting the stock carb back on and im not sure how i need to change the jetting. it has an fmf fatty with a powercore 2 silencer and it is bored .60 over any ideas for what i should start with? and i currently run 60:1 premix any suggestions for what premix i should run?