Honda 400ex Bogs at Full Throttle

Carb tuning guide for all Honda 400ex

[@Scott00]

Hope you mean 150-155 dynojet, if stock jet then its probably closer to a 165 with the lid.
Edit: watched end and seen its a china carb.

[@trig2127g]

Thanks man, my 400ex is doing exactly the same. I'm gonna look into the jetting.

[@kingdink343]

What’s the problem