YD45chain saw.chain saw.petrol chain saw.gasoline powered tool are good quality and the competitive price ,we have CE,GS chain saw,gasoline sawEngine: 1E43F, 2 ... -stroke, single-cylinder, air-cooled gasoline engine Bore x Stroke: 43 ... CDI Start: recoil pull start Compression ratio: 7.5:1 Gasoline and oil mixed ratio: 25:1 90# gasoline25: 2- ...