carb help

[freeman79]

ok iv looked but, i Cant find anything along the lines of mine, so im asking the question. i have a 400 that i bought it had a k/n air filter with holes drilled in the lid, they are about 15- 1/2 inch size holes drilled in it.
it has a slip on fmf and i had to have it bored 30 over because it was smoking. so i took the carb off tonight athe jets in it is 148/38. my question is. this seems like i allways hit a brick wall, seems like it needs more what should i be running plus i live in NC. thanks any help would be helpfull.

[honda400ex2003]

ill give my suggestions but im not going to look up what 30 thousandths over is lol.

after you figure out what is get back to me. lol sorry i am doing a bunch of other stuff with my hw tonight so im not going to go searching for it.

steve

[JRN2786]

.30 over would be a 85.25mm piston I think. but that would make it about 400cc if my calculations are right. Pro X is the only one who list a piston in that size

[honda400ex2003]

158 main, 3rd notch, 42 pilot, 2.5 turns out.

steve

[freeman79]

thanks alot hopefully this will help. where do i adjust for the 2.5 turn. sorry im a little slow.lol

[honda400ex2003]

no biggy, i get complacent and assume that most know what i am talking about if they are going to jet these things. not that it is hard but I assume that people have read something which doesnt seem to happen real often this time of year lol. the f/a screw, which is underneath the carb toward the engine side boot. go out from lightly seated 2.5 turns.

steve

[freeman79]

got my jets im going to put them in.:)