300ex owners w/ 400 carbs

[dirtmomma]

Well I haven't got the carb YET hoping it 's in the mail hahahaha, but anyway I'm wondering where to start w/ jetting when I do get it. I'm @ about 500-800 ft I would just like some ideas so I don't have to spend days & days having jetting issues :D Thanks if you can help!! I fit matters aobut mods they are in my sig not too many yet!

[BLURR250X]

Yes I want to know the same thing. I plan on buying one in a couple weeks. Is anyone running a 400 carb with a modded 250/300 motor like the one in my sig?

[ghak99]

I don't have mine dialed in right yet, but with the mods in my sig 148 is lean and 162 is too rich. I am guessing 155 is going to be close.