Please Help.

[Phillburt57]

I have a 2005 400ex and I have put the FMF Powerbong and a Powercore 4 with the K&N filter and I have re jetted but Iam running really rich. I literally foul a plug each day I ride. What jets should I be using? Is it my fuel to air ratio? Should I be running it w/o the air box lid?

[Honda#4]

What are you running for jets first off?

[Phillburt57]

A 170 Main...... Should I change it to a 140?

[Phillburt57]

I have the Dyno jets and the carb is completely out right now so if I re-started completely what jets should I use with my set up.

[Eviltanker]

Try starting with DJ 140 through a 146 main.

[Honda#4]

I have to agree with Eviltanker.