Engine model:1E43F Engine type: Single Cylinder, Two-stroke, Air-cooling Bore x Stroke:43x31mm Displacement:45cc Compress ratio:6.6:1 Power rating:1.7kw/7500rpm Fuel tank capacity:550ml Oil tank capacity:260ml Fuel mixture ratio:25(90# Gasoline):1(Two-cycle oil) Lube brand: Special Oil for Two-stroke engine Lgnition system: CDI Starting system: Recoil starter Engine net weight:4.85KG Standard guide bar:18/20/22in Chain pitch:3/8/0.325in Chain gauge:0.050/0.058in G.W/N.W:7.5/6.5KG