FLY WING FW-150CC

Type: 4-stroke, single-cylinder, forced air-cooled, SOHC (Single Overhead Camshaft).Displacement: Generally \(149.6 \text{ cc}\) or \(150 \text{ cc}\) (50cc and 125cc versions also available).Bore x Stroke: \(57.4 \text{ mm} \times 57.8 \text{ mm}\) (typical 150cc).Maximum Power: Approx. \(6.2 \text{ kW} - 7.88 \text{ kW}\) @ \(7000 - 7500 \text{ RPM}\).Fuel System: Diaphragm carburetor (CV type).Lubrication: Pressure splash (wet type).Ignition/Start: CDI / Electric and kickstart.Transmission: Automatic CVT (wet centrifugal clutch).Crankcase Variants (Swingarm): Short case (10" rim) and long case (12-16" rim).Differences and Maintenance:Identification (GY6A vs GY6B): "A" engines (common QMB139 or 157QMJ type) usually have a cylinder stud spacing of \(54 \text{ mm}\), while "B" engines have \(57 \text{ mm}\).Maintenance: It is crucial to change the engine oil every \(1000 - 2000 \text{ km}\), as most do not have a full-flow oil filter.Drive Belts: They typically use sizes like 743-20-30 (short case) or 842-30-30 (long case).