Max cutting diameter: 405/455mm Engine:1 Cylinder,2 Stroke,Air-cooling Displacement: 45cc Compression ratio: 6.1:1 Rated output power and relevant speed: 1.7kW / 7000rpm Idle speed: 2800rpm Oil/Fuel mixture ratio: 1:25 Fuel tank capacity: 550ml Oil tank capacity: 260ml Chain pitch: 0.325? Gauge: 0.058?