New carbs??..

The old TQ bowl warpage issue is/was real due to the increase heat generated by the engines for emissions purposes. I’ve had a bowl crack on me. The engine was still stock at the time. After a few changed parts, a cooler thermostat being one of them, I never had a problem since.

I haven’t heard/read any issues with the composite center of the street demon. The only complaint is removing the carb in full to access the attaching hardware under the carb in order to tune the carb.

That would drive me nuts.