Dimensions: 400 x 255 x 280 mm Weight (dry engine): 6.0 kg (13.2 lb) Engine: air-cooled 2-stroke single-cylinder, 54.7 cc (3.33 cu in) Carburetor: Walbro HDA diaphragm Ignition: CDI flywheel magneto, NGK BPM7A spark plug Starter: recoil Transmission: automatic centrifugal clutch Fuel: 25 : 1 gasoline-oil mix (50 : 1 with special oil) Fuel tank: 0.50 L (16.9 fl oz) Chain-oil tank: 0.25 L (8.5 fl oz) Features: front hand guard, guide bar cover, spike bumper Chain options: 9" Echo low-kick-guard; Oregon 16a50 7929, 7930, 30590, 30591, 7331 Chain brake only for CS-550EVLP.