pilot jets

[riverex]

i am having troubles starting my 400ex in the cold it has the stock 38 pilot jet. where can i buy a bigger jet and what size

[cals400ex]

go to a local dealership or C&D racing off of this site. i would go with a 40 or 42.

[riverex]

thanks!! would i have to change back in the summer I live in nebraska right know it is about 10 degrees out in the summer it is usually over 90. how many turns on the fuel mixture screw.

[mustang93]

leave it all year round, I run about 1 1/2 turns out w/ a 42 but every bike is different

[hondarider2006]

I run a 42 at 2 turns out, and that is in the winter. Haven't had a chance to see about in the summer, but it will probably stay the same.

[cals400ex]

in the summer you shouldn't have to change pilot jets. i would just lean out your mixture in the summer months using the fuel skrew on the bottom of the carb.