Type: Single cylinder, Four stroke, Forced air cooling Cylinder dia: 57.4mm Amount of air exhaust: 150cc Max.power: 6.0kw/7500rpm Rated output: 5.5kw/7000rpm Max.torque: 8.3nm/6000rpm Min.fuel rate:3.54(g/kw.h) Air drain clearance: 0.06?.01mm