O.S. .21 RG-X (P) w/Pull Start

 Displacement: 3.46cc  (0.211 cubic inches)
          Bore:         16.6mm (.654")
          Stroke:       16mm (.63")
          Weight:       397.5 grams (14.03 ounces)
          Power Output: 1.9 BHP at 30,000 RPM
          Practical RPM Range: 3,000 - 32,000 RPM
          Crankshaft Thread Size: 1/4-28
          Length: 83.2mm (3.28") from Front of Front Bearing to Rear of Recoil
          Width: 29.6mm (1.17") the Width Neglecting the Mounting Flanges
            37mm (1.46") Distance Across Crankcase Measured Between the Centers
          Height: 97.1mm (3.82)