Jetting opinion

[kt1148]

I recently added a Moose air filter and Motoworks slip-on. I currently have 150main/42pilot. When I called Motoworks for jetting recommendations, they said stock jetting was fine for the 400ex?:huh (air box lid on)

[ridehonda400ex]

Theyre full of ****. your jetting sounds good. pilot might be one size to big when it gets warm out. but sounds pretty good the way it is for the cold

[honda400ex2003]

i say that you should be good to go with the lid on if you are 1500 feet or more above sea level. I never had any issues with that. if you are below 1500 you could probably go 152 or so and be fine. put the f/a screw at 2.5 turns out also and leave the needle alone.

I recommend a 150 90% of the time.

steve

[kt1148]

thanks for the info guys. I'll check it over more this weekend, were suppose to hit -9 temp tonight:eek2: I just don't understand how they say stock jetting will be fine

[honda400ex2003]

that is not stock jetting...

if it is that cold, def run a 152 at least till it warms up again. that is more of a summer jetting setting.

steve

[PLF]

Originally posted by kt1148
thanks for the info guys. I'll check it over more this weekend, were suppose to hit -9 temp tonight:eek2: I just don't understand how they say stock jetting will be fine

:D Its -27 C here (-16 F) 160 no lid seems to run perfect loll

[honda400ex2003]

hes not running a lid though so it will be significantly less that a 160. max would be a 155 for super super cold stuff.

also, glad to hear you got your machine dialed in. keep that 158 and 155 around for summer. :D

steve