Yamaha XMAX YP250R Service Manual download pdf (Page 192)

ENG

CHAPTER 5

ENGINE

ENGINE REMOVAL

........................................................................................5-1

LEADS, HOSES, EXHAUST PIPE AND MUFFLER .................................5-1

ENGINE.....................................................................................................5-3

INSTALLING THE ENGINE.......................................................................5-4

CYLINDER HEAD

............................................................................................5-5

REMOVING THE CYLINDER HEAD.........................................................5-7

CHECKING THE CYLINDER HEAD .........................................................5-8

CHECKING THE CAMSHAFT SPROCKET..............................................5-9

CHECKING THE TIMING CHAIN TENSIONER........................................5-9

INSTALLING THE CYLINDER HEAD .......................................................5-9

CAMSHAFT AND ROCKER ARMS

..............................................................5-13

REMOVING THE ROCKER ARMS AND CAMSHAFT............................5-14

CHECKING THE CAMSHAFT.................................................................5-14

CHECKING THE ROCKER ARMS AND ROCKER ARM SHAFTS ........5-15

INSTALLING THE CAMSHAFT AND ROCKER ARMS ..........................5-17

VALVES AND VALVE SPRINGS

..................................................................5-19

REMOVING THE VALVES......................................................................5-20

CHECKING THE VALVES AND VALVE GUIDES ..................................5-21

CHECKING THE VALVE SEATS............................................................5-23

CHECKING THE VALVE SPRINGS........................................................5-25

INSTALLING THE VALVES ....................................................................5-26

CYLINDER AND PISTON

..............................................................................5-29

REMOVING THE PISTON ......................................................................5-30

CHECKING THE CYLINDER AND PISTON ...........................................5-30

CHECKING THE PISTON RINGS...........................................................5-32

CHECKING THE PISTON PIN................................................................5-33

INSTALLING THE PISTON AND CYLINDER .........................................5-34

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Yamaha XMAX YP250R Service Manual Page 192