Ok i have a 2005 400ex, i just did a complete top end rebuild, i have about 9 hours on the rebuild, it ran fine until my last ride. it will only start with the choke completely on and when it does start it is bogging out really bad until i get it to the top end of the gear, it does it in every gear. And when it goes back down to the low end it goes back to bogging down. Things I’ve done to try and fix it. Adjusted the valves, brand new carb rebuild kit and fresh oil change and gas. The next thing I was gonna replace is the valve assembly cut off valve in the carb next the the throttle cable. If that doesn’t work I’m out of ideas. If you have an idea please shed some light to help me out.
Thanks in advanced