Power unit — removal and installation Before removing the power unit, you must place the motorcycle on the center stand. We remove everything that can interfere with the removal of the power unit: fuel tank (see « Fuel tank - removal and installation »), carburetor bar (see « Plank...
Description of the engine design The Honda CB400SF motorcycles are equipped with a 399 cm 3 four-cylinder four-stroke engine of the NC23E modification. Engine power is 53 hp at 11000 min -1 , torque 37 Nm at 10000 min -1 . The engine is designed to use gasoline with an octane...
Compression in cylinders — check Attention! To check compression, the engine must be warm and the battery fully charged. To check the compression in the cylinders, you must first remove the fuel tank (see « Fuel tank - removal and installation ») and disconnect the four low voltage...
Cylinder head — checking and adjusting valve clearances Checking and adjusting the thermal clearances of the valves must be done every 24,000 km. To check and adjust the thermal clearances of the valves, it is necessary to remove the cylinder head cover (see « Cylinder head - removal and installation »)....
Cylinder head — removal and installation It is necessary to remove the cylinder head in cases where the valve mechanism or parts of the gas distribution mechanism require repair. It is not necessary to remove the power unit from the motorcycle to remove the cylinder head. (In the...
Valves — removal and installation, grinding in The valves are removed from the cylinder head removed from the engine (see « Cylinder head - removal and installation »). Valves are subject to lapping in case of their leaky fit to the seats. To check the tightness of the valves, we install the...
Timing chain tensioner — removal, inspection and installation The tensioner is removed with the carburetor bar removed (see « Plank carburetors - removal and installation »). Removing 1. Use a 10 mm socket wrench to loosen plug 1 of the timing belt tensioner screw, then use an 8 mm wrench to unscrew the two...
Starter drive mechanism — disassembly and assembly Disassembly 1. Using an 8 mm wrench, unscrew the seven bolts securing the left engine cover. 2. Remove the cover, clean the surfaces of the cover and crankcase from the remnants of the old gasket. 3. We keep the overrunning clutch from turning,...