Specs:Displacement: 26.23cc (1.60 cu in)RPM range: 1,800 - 10,000Bore: 33.6mm (1.32")Stroke: 29.6mm (1.17")Weight: Engine- 930g (32.8oz) Muffler- 275g (9.7oz)Horsepower: 3.7 BHP at 9,000 RPM