Hey guys i wouldn't mind some help i have a all stock 400ex but i heard i should rejett bc of how lean they run from factory any ideas maybe a 150 main????

 

Welcome to the forums.

 

Post your questions in the Honda section for better results, this area is only for introductions. Personally I would order a complete rebuild kit from a company that specializes in jetting.

 

Welcome to the forums.

 

Hi Juan: Greetings from Colorado. I'm new too and don't know a darn thing about larger jets in a Honda 400ex. I do know when I rejetted the Webers on my old Alfa it ran terrible. There is more to consider than just more fuel. You might need more air or more valve timing to gain any power.

I agree with Kymco 450, if you search, read and post in the Honda section you will get good answers to your questions.

That said, ATV Connection is always happy to have a new participant. You are welcome here.

David