440 ex jetting question

[chrisM426]

I got a 440 ex I just bought it he said it's jetted for the stock pipe cuz it would be too loud for where he rides but anyway if I get a pipe do you think I'll have to rejet? He thought no but I think it will but want to see what you guys think thanks!

[zukrider03]

is it a 400ex with a big bore kit installed making it a 440ex regardless if you put on a pipe any after market pipe it will have more flow and you will have to re-jet

[chrisM426]

ok thanks any idea what size jets?

[T-Rex]

#45 pilot jet, #172 main jet...

[chrisM426]

Is that with a full system I just bought a full and am not sure if you mean slip on

[mcv0728]

You will just have to see if the bike is running too lean or too rich then adjust the jets up if its too lean and down if its too rich. just look at your spark plug to tell.