400EX jetting

[Bud400EX]

I put rings in my 2000 400ex (smokeing a lil bit) and a full yosh system, now it runs really lean head pipes glow in the first 5 minutes i got a 162 main and whatever stock settings are i need to know what is going on? I know putting the yosh system on will lean it out a lil bit. please help

[400exstud]

It could be the needle and pilot jet because a 162K sounds pretty good.:confused:

[sprtrx300ex]

Originally posted by 400exstud
It could be the needle and pilot jet because a 162K sounds pretty good.:confused:

yup

[underpowered]

does it get red at an idle, when riding hard, putting around??? if it getting red just idleing, go up on your pilot jet and maybe adjust your air screw. if is does it when riding, id dont know because that 162 is about right, possibly a little small.