The T21 had an air-cooled 247cc parallel twin 2-stroke, CCI. Bore x Stroke: 54 x 54 mm 30.5 hp/ 8,000 rpm, 2.82 kg-m/ 7,000 rpm.
This bike looked much like other manufacturers' bikes of the time. It was equipped with turn indicators and center support stand. The exhaust was low swept indicating street use.