what jet to start with

[JIMFROMTEXCO]

im gonna put a 400ex carb on my 350x/250x, should i start with a stock jet and go from there?

[Sjorge450R]

Originally posted by JIMFROMTEXCO
im gonna put a 400ex carb on my 350x/250x, should i start with a stock jet and go from there?

yep

[bwamos]

For a mostly stock motor.. yes start with the stock jetting and tune from there. It should be fairly close.