So, l've just finished dialing-in my DT1 race bike, l'm so happy with how it performs l must say, she rips from the bottom-end no sweat. Piston-port with a 38mm carb, with an intake & exhaust port you could drive a truck through; l was dreading a light-switch screamer but even if l was allowed to use a reed-valve, l wouldn't !
She picks up the front wheel in the first three gears with just throttle ! lt doesn't feel a great deal slower than my KX400 or CR500 !
l remember as a kid, our TM & CR125's were loading-up all over the place, scared me off piston-ports, l have a whole new respect :-)