I have now cleaned the carb with an ultrasonic cleaner. Installing the carb was hell because I couldn't remember how I got the air tube connected to the box and fitted on the carb. Went through hell, then the idea came, yea!
They say if it is difficult you are doing it wrong. I thought the carb tube install was the exception, but perhaps not...
Install carb with tube removed. Then put some vegetable oil on tube for workability. Work in warm weather for plastic tube flexibility.
Push the tube through the box towards the carb, and pull the 'rabbit ears' to position the tube slightly over the carb opening.
The trick: In the box area, push in one edge of the tube so that the cross-section is indented, popped inward (cross section now looks like Pack-Man). The tube is now a smaller diameter.
This will allow you to maneuver the tube into the box hole and then to set the tube grooves over the box's hole edges and to join the tube over the carb opening. Once all set, push the indent outward so that it is once again, a circle, and engaged in the box's hole edges.
Honda Rebel 2005; Yamaha TX500 (prior)