CHAPTER 4 ENGINE ENGINE REMOVAL ........................................................................................4-1 AIR DUCTS, MUFFLER AND EXHAUST PIPE ........................................4-1 SELECT LEVER UNIT ..............................................................................4-3 LEADS, CABLES AND HOSES ................................................................4-4 ENGINE MOUNTING BOLTS ...................................................................4-6 INSTALLING THE ENGINE.......................................................................4-8 INSTALLING THE SELECT LEVER UNIT ................................................4-9 CYLINDER HEAD ..........................................................................................4-10 REMOVING THE CYLINDER HEAD.......................................................4-12 CHECKING THE CAMSHAFT SPROCKET............................................4-13 CHECKING THE TAPPET COVERS ......................................................4-13 CHECKING THE TIMING CHAIN TENSIONER......................................4-13 CHECKING THE CYLINDER HEAD .......................................................4-14 INSTALLING THE CYLINDER HEAD .....................................................4-15 ROCKER ARMS AND CAMSHAFT ..............................................................4-18 REMOVING THE ROCKER ARMS AND CAMSHAFT............................4-20 CHECKING THE CAMSHAFT.................................................................4-20 CHECKING THE DECOMPRESSION SYSTEM.....................................4-21 CHECKING THE ROCKER ARMS AND ROCKER ARM SHAFTS ........4-21 INSTALLING THE CAMSHAFT AND ROCKER ARMS ..........................4-22 VALVES AND VALVE SPRINGS ..................................................................4-25 REMOVING THE VALVES AND VALVE SPRINGS ...............................4-26 CHECKING THE VALVES AND VALVE SPRINGS................................4-27 INSTALLING THE VALVES AND VALVE SPRINGS..............................4-31 CYLINDER AND PISTON ..............................................................................4-34 REMOVING THE PISTON ......................................................................4-35 CHECKING THE CYLINDER AND PISTON ...........................................4-35 CHECKING THE PISTON RINGS...........................................................4-37 CHECKING THE PISTON PIN................................................................4-38 INSTALLING THE PISTON AND CYLINDER .........................................4-39 AC MAGNETO ...............................................................................................4-42 REMOVING THE AC MAGNETO ROTOR..............................................4-45 CHECKING THE STATOR COIL AND CRANKSHAFT POSITION SENSOR ................................................................................................4-46 CHECKING THE STARTER CLUTCH....................................................4-46 CHECKING THE TORQUE LIMITER......................................................4-47 INSTALLING THE AC MAGNETO ROTOR ............................................4-47 ENG