Dies if brakes are applied suddenly

Does it do this if you just suddenly pull your foot off the gas and pop it out of gear, to drop quickly from a few thou RPM to idle RPM? And are you pushing in the clutch or popping it out of gear when you brake hard, casuign a quick drop in engine RPM's? Just looking for a reason to think that a sudden stop in air flow is upsetting the mixture; it will tend to go rich with any sudden stoppage in airflow, regardless of carb position and deceleration forces.
it does it under a sudden stop, but I usually have enough time peddle it a little an it stays running. If I have to slam on the brakes while stepping on the clutch also, it will die if I don't peddle it a little. I guess the fix might be not to ride people's asses. Lol.