Took the carb off the CR50F . Could'nt get pilot jet clean , wire would not go through , after removing it from carb body , and still can't get through , I decided to torch the jet , propane torch , drop it in carb cleaner to cool , re heat , re cool , burned through varnish and now can get through with wire , re assembled and ....... of course it worked ... Lesson , heat on brass jets work .!!!!