You can drop the bowls down from the carbs without need to adjust anything as long as you don't need to disassemble farther. Only issue is the original screws strip very easily, if you take them out I would buy some allen head or torx head screws to replace them. You could also just open the drain to be sure you have fuel flow, if you do, put a clear tube on the nipple and hold alongside the carb. It will fill to the float level.The level should be about the top of the bowl. You could then run the bike and see what the level does. That's harder to do due to vibration.

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