Yes, remove the mix screws and their associated parts before attempting to force carb cleaner through the circuit. One of those parts is a small o-ring and the carb cleaner can destroy it .....
As far as the technique for cleaning the pilot circuit goes, I've outlined it numerous times already on the forum here. Do a search and it should come up. If you find some of my pics missing from the thread, let me know and I'll replace them.
As far as the technique for cleaning the pilot circuit goes, I've outlined it numerous times already on the forum here. Do a search and it should come up. If you find some of my pics missing from the thread, let me know and I'll replace them.