Displacement: 3.46 cc (0.211cu.in.) Bore: 16.6 mm (0.654in.) Stroke: 16.0 mm (0.63in.) Practical R.P.M: 3,000~36,000 r.p.m Power output: 2.0 ps/30,000 r.p.m Weight: 433g (15.27oz.)