Jetting a 440

[Wr3sTl3b0y]

i got a 400ex with a 440 big bore kit recently installed i have a k&n air filter pre filter and white bros slip on i know it needs to be rejeted i dont have anyone to do it and wanted to know what jets to buy to replace the stock

[sab24711]

48 or 50 (no lid) pilot darn brain fart i cant remember what the main is on mine.

[Wr3sTl3b0y]

isnt that pretty low for having a big bore kit and k & n

[Wheelie]

Stock carb---42 or 45 pilot and 175 main, clip on 4th notch from top on needle.


450R Carb--48 pilot and 185-190 main, clip on 4th notch from top on needle.

[sab24711]

no sorry it was a 42 pilot it works fine even in the dead of winter it starts up quick. and i have a 155 main thats with the stock carb i say junk that or sell it get a 450 carb you can mess with the stock all day but you will never get the power that a 450 will throw at you. i mean you went with the big bore for a reason might as well get all the potential out of her.

[Wr3sTl3b0y]

true to that i may just head down that road the 450 carb then get it rejeted

[sab24711]

best bet is to find it on here someone parting out a 04/05 450r alot cheaper (if on budget) than ebay. i find they do good deals around here even though its used. but hey everything becomes used at some point i just think of it as being broken in for me!

[Wr3sTl3b0y]

im going to pick up a 42 pilot 170 main and maybe one lower and one higher bc i been reading and it sounds very precise to get it to run right