Not understanding what you mean by "choke position" but if you asking which sude it must be on and also referring to previous question the larger bell side of the carb goes to the rear of the bike toward the axle. Your slide height on the carb should be seated all the way down in the catb. If your flioding it with no crack of the throttle than the pilot is super rich.
Let us know the set up.
Carb - what kind?
Carb jet sizes
elevation
air temp
porting
head work
pipe
fuel
What is the pickup gap at the flywheel.
Are the electronics in spec?
Gap on the plug
what plug are you using
Alot of things need to be answered yo simulate "us" being there with you to help you out.