Engine main parts include: crank connecting rod mechanism: connecting rod, crankshaft, shaft, flywheel, piston, piston ring, piston pin, crankshaft oil seal; gas distribution mechanism: cylinder head, valve cover, camshaft, valve, intake manifold, exhaust manifold, air filter, silencer, three-way catalyst, supercharger, intercooler, etc.; cooling system: generally consists of water tank, water pump, radiator, fan, thermostat, water temperature gauge and drain switch; lubrication system: engine lubrication system consists of oil pump, filter collector, oil filter, oil duct, restrictor valve, oil gauge, pressure-sensitive plug and dipstick, etc. Lubrication system: engine lubrication system by the oil pump, collector filter, oil filter, oil channel, pressure limiting valve, oil table, pressure-sensitive plug and dipstick, etc.; fuel system: gasoline engine fuel system by the gasoline tank, gasoline table, gasoline pipe, gasoline filter, gasoline pump, carburetor, air filter, intake and exhaust manifold, etc.