Problem over the whooops

[nitro_nb]

My quad feels like its about ready to die when I go over the whoops and it just bogs down like its gettin no fuel don't know what I should try first. I got a 01 EX with a yoshi slip on and K&N with no lid. 155 main jet pretty sure stock needle and pilot. I'm at sea level right on the coast. I adjusted the valves and cleaned the carb what next?

[2002Honda400ex]

Try adjusting the air/fuel screw. Make it a little more rich if you are running lean. You could also put in a bigger jet

[Sparky_20]

mine does the same thing and its pure stock, maybe normal?

[400exrider707]

My 450R would do this as well as when landing from a jump on the gas. Try running with the petcock on reserve, it cures the R's problems. Also you need to bump up the pilot jet and lower the clip on your needle.

[GPracer2500]

One thing to check is make sure the slosh baffle is still there and in place. It's that little plastic "cup" that surrounds the main jet.