I am still working with this issue on my 200 Venom (J200STLECE)
I have rebuilt the carb for #6, it looked very clean inside. Made sure all ports were clear. Float is level per manual recommendations.
I have compression of 95lbs to 6 and the same for all other cylinders.
I am getting fuel into the bowl (loosened the high speed orifice bolt and squeezed primer bulb. Fuel came out)
I even swapped the #5 carb with #6 because I started wondering if the carb is just bad.
I did not swap the throttle body which has the calibration pocket on the side.
I do have spark to #6. I have brand new recommended plugs and #6 does not get wet with fuel.
When it is running, I have done the dollar bill test that Championman recommended to see if the reeds were good.
I have stumbled across something else while searching and since it is the lowest carb, could it be the lower crankshaft seal is bad?
The only other thing that I have not checked is the recirc line. Maybe someone could answer exactly what the recirc lines are for.
Also, what is involved with the lower crankshaft seal?
Some sites I hear it is pretty simple but I am not thinking so on my engine. Maybe on a small engine.
When I push in the key, it will stall the engine after 5 to 10 secs.
Any more recommendations would be helpful.
Thanks BBC