what is the stock bore of 400?

[gopeddin400EX]

i am sorry if this is already on here but i have searched a few times and i cant find it, so can somone please tell me the stock size bore of a 400EX..AND if i do a 440 kit with a stage 2 hot cams, stock header but white brothers slip on, stock carb what jet i should run

[2004exrider]

std bore-397cc or 85mm
402- .40 over or 86mm
406- .60 over or 86.5mm
416- .80 over or 87mm
426- .120 over or 88mm
440- .160 over or 89mm

keihn or dyno jet?
if keihn try around a 175 or so, may be a little lean or a little rich. but it should be a good starting point. also get a full exhaust.

[gopeddin400EX]

ok cool thanks. its a kehin tho. thx