What is the correct procedure for removing the stock carb cap on a 2004 Blaster? Obviously it will ultimately screw off counterclockwise but there is a cutaway on the carb body itself with what appears to be some sort of locking tab that has me a little stumped as of the moment. That is a new one for me and completely different that my MX bikes and I don't want to damage it. Any tips or help would be greatly appreciated.