help jetting.....

[itismejoshy]

ok i finnaly toasted my 426 piston, it's been about 3 years. so i sent out today get bored to a 440, but what i need to know is what size jet i should be putting in it when i get it back? here is a list of other mods i have(different bike then in my sig)

K&N
head is flowjetted
sparks full system
airbox lid removed
stage 2 cam
and the new piston is 11.1
aftermarker cdi -don't remember brand


just around about what size should i start with??
thanx guys!:)

[Honda#4]

Try a 42 pilot 165 or 170 main, needle on the 4th slot from top and the fuel screw out 3 turns.

[mr._bowtie]

I would probably go a little bigger then that on the main jet. I ran a 440 with roughly the same mods and ended up with a 185 main in it before It felt good through the middle half of the rpm range. I agree ont he pilot though... a 42 sounds right down there.

[Honda#4]

It depends on his altitude, start with the 170 main first. I've never suggested a 185 main yet to a person.

[mr._bowtie]

Well I wouldnt have thought I could have used that much fuel either, but for the combo I had it worked great. Like you say elevation plays into it, I also had a 416 with a big Web racing cam and 11-1 piston and I ran a 170 in it. Never had any trouble with it running rich.

Are you planing on moving your needle any?

[itismejoshy]

thanks guys i will give it a try and see what happens....josh