Engine - Yamaha R15 2022 Service Manual

ENGINE REMOVAL .......................................................................................5-1
INSTALLING THE ENGINE ......................................................................5-5
INSTALLING THE SHIFT ARM ................................................................5-5
INSTALLING THE EXHAUST ASSEMBLY ..............................................5-5
CYLINDER HEAD ...........................................................................................5-7
REMOVING THE CYLINDER HEAD ...................................................... 5-10
CHECKING THE CYLINDER HEAD ...................................................... 5-11
CHECKING THE CAMSHAFT SPROCKET AND
TIMING CHAIN GUIDE ......................................................................... 5-11
CHECKING THE TIMING CHAIN TENSIONER ..................................... 5-12
CHECKING THE DECOMPRESSION SYSTEM .................................... 5-12
INSTALLING THE CYLINDER HEAD .................................................... 5-12
CAMSHAFT .................................................................................................. 5-16
REMOVING THE CAMSHAFT ............................................................... 5-17
CHECKING THE CAMSHAFT ................................................................ 5-17
CHECKING THE ROCKER ARMS AND ROCKER ARM SHAFTS ....... 5-18
REMOVING AND INSTALLING THE CAMSHAFT BEARING ............... 5-18
INSTALLING THE CAMSHAFT AND ROCKER ARMS ......................... 5-19
VALVES AND VALVE SPRINGS ................................................................. 5-21
REMOVING THE VALVES ..................................................................... 5-22
CHECKING THE VALVES AND VALVE GUIDES ................................. 5-22
CHECKING THE VALVE SEATS ........................................................... 5-23
CHECKING THE VALVE SPRINGS ....................................................... 5-25
INSTALLING THE VALVES ................................................................... 5-25
CYLINDER AND PISTON ............................................................................. 5-27
REMOVING THE PISTON ..................................................................... 5-28
CHECKING THE CYLINDER AND PISTON .......................................... 5-28
CHECKING THE PISTON RINGS .......................................................... 5-29
CHECKING THE PISTON PIN ............................................................... 5-29
INSTALLING THE PISTON AND CYLINDER ........................................ 5-30
MAGNETO AND STARTER CLUTCH .........................................................5-32
REMOVING THE MAGNETO ................................................................. 5-34
REMOVING THE STARTER CLUTCH .................................................. 5-34
CHECKING THE STARTER CLUTCH ................................................... 5-34
INSTALLING THE STARTER CLUTCH ................................................. 5-35
INSTALLING THE MAGNETO ............................................................... 5-35
ELECTRIC STARTER .................................................................................. 5-37
CHECKING THE STARTER MOTOR .................................................... 5-39
ASSEMBLING THE STARTER MOTOR ................................................ 5-40

ENGINE

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