05 450r

[sc400ex_rider]

has a 118 main jet, that seems very small. what should i go to? thx

118 is stock. What are your mods.

[sc400ex_rider]

check my sig its going on a 400ex

[400exrider707]

155-165 main Im guessing, not sure what the 450R carbs add, but if it was a stock carb a 155 would do fine