Both ports should lead to & from the accelerator pump area. [ look inside the accelerator pump cylinder where the plunger fits ] The slow speed port, small hole under the throttle plate has to be cleared. If carb cleaner does not clean it out you may has to remove a manufacturing port plug [typically white metal] and use a hand drill or wire to clean out the carb port. Reseal the access to the port with a ball bearing or a small screw. Dave W