Help with Jetting on 440

[schuie]

I have just bored my 400 to a 440 with a Hotcam Stage 2. I have a WB R4 slip on, and a K&N with a close air box. I was wondering what jetting to use.

My altitude is about 1000-1200 feet.

I was also wondering what jetting to use with an open air box. I am thinking of opening it up.

I just need a starting point

Please Help

[400ex men]

you never know so buy a jet kit:)

[mojoe2878]

i would start with a 162 or 165 with the lid on and start with a 165 or 168 with the lid off. i run a 170 with a 440, full exhaust and no lid. but like 400ex men said you need a kit because everyone seems to end up with a different best final jetting even when they have about the same modes.

[sled_ed 300ex]

My friend hade a 440 before his 500EX!!!!!! and he ran a 165 main jet and a 42 pilote jet!! good luck!!

[cals400ex]

i would start with a 158-160 KEIHIN with the lid on and maybe a size larger with the lid off. jetting will change as the temps change.