Yamaha YFM90RA Model Vehicle User Manual


 
ELECTRICAL SYSTEM.................................................................................3-37
CHECKING AND CHARGING THE BATTERY.......................................3-37
CHECKING THE FUSES.........................................................................3-44
CHAPTER 4
ENGINE
ENGINE ...........................................................................................................4-1
EXHAUST PIPE/MUFFLER, BREATHER HOSE AND LEADS ................4-1
ENGINE MOUNTING BOLTS ...................................................................4-2
REMOVING THE ENGINE........................................................................4-3
INSTALLING THE ENGINE.......................................................................4-3
CYLINDER HEAD............................................................................................4-4
REMOVING THE CYLINDER HEAD.........................................................4-6
CHECKING THE CAMSHAFT SPROCKET..............................................4-7
CHECKING THE CYL. HEAD COVER ASSY............................................4-7
CHECKING THE TIMING CHAIN GUIDES...............................................4-7
CHECKING THE TIMING CHAIN TENSIONER ASSEMBLY ...................4-7
CHECKING THE CYLINDER HEAD .........................................................4-8
INSTALLING THE CYLINDER HEAD .......................................................4-9
CAMSHAFT, ROCKER ARMS AND VALVES..............................................4-11
REMOVING THE ROCKER ARMS AND CAMSHAFT............................4-12
REMOVING THE VALVES AND VALVE SPRINGS ...............................4-12
CHECKING THE CAMSHAFT.................................................................4-13
CHECKING THE ROCKER ARMS AND ROCKER ARM SHAFTS ........4-13
CHECKING THE VALVES AND VALVE SPRINGS................................4-15
INSTALLING THE VALVES AND VALVE SPRINGS..............................4-19
INSTALLING THE CAMSHAFT AND ROCKER ARMS ..........................4-20
CYLINDER AND PISTON..............................................................................4-21
REMOVING THE PISTON ......................................................................4-22
CHECKING THE CYLINDER AND PISTON ...........................................4-22
CHECKING THE PISTON RINGS...........................................................4-24
CHECKING THE PISTON PIN................................................................4-25
INSTALLING THE PISTON.....................................................................4-26
INSTALLING THE CYLINDER ................................................................4-27
C.D.I. MAGNETO...........................................................................................4-28
REMOVING THE C.D.I. MAGNETO ROTOR .........................................4-29
CHECKING THE PICKUP COIL/STATOR ASSEMBLY..........................4-29
INSTALLING STATOR COIL ASSEMBLY ............................................4-30
INSTALLING THE C.D.I. MAGNETO ROTOR........................................4-30