O.S. SPEED 12TZ(EFRA) W/11HBS CARB.

This is the O.S. Max 12TZ (P) Pilot Crankshaft
                   Speed Tuned Engine for 1/10 scale racing.
                         Meets EFRA specifications.
SPECS:    Bore:         0.54" (13.8mm)
          Stroke:       0.55" (14.0mm)
          Displacement: .12 cu in (2.11cc)
          Practical RPM Range: 5,000-43,000
          Power Output: 1.65 ps/34,400 RPM
          Weight: 7.92oz (224.5g)