Help me get my slant running right

You usually don't see any gas. What you will see is a stain that runs from the bottom of the throttle shaft down the side of the carb. If that is there your throttle shaft is worn and sucking air when it is in the position where it spends most of its time. Usually just off idle. The only way to fix it is to rebush the throttle shaft bore and install a new shaft or get another carb.