It's a1-cylinder,4-stroke,oil-cooled,internal counterbalance shaft engine with a displacement of (ml) 397.2 which is an engine capacity of 400cc. Its Bore* Stroke (mm) is 85*70 and the compression ratio is 8.8:1 with a maximum power (kw/r/min) of 20.5/7000 and a maximum speed of 180kph.