My YZ has a FCR. Incredible carb with absolutely insane throttle response. World of difference between the CV carb on the trail bike vs the racing oriented YZ.
Anyway, there seem to be clones of the 30mm keihin CVK carbs. This is (a clone of) the carb you are referring to, ckau?
Awesome failure photo, BTW. I'm assuming the bottom failed then ripped the top off? I'm surprised it didn't tear the tubing. Reminds me I've been wanting to add even more reinforcement to my front end..