Yamaha 2010 XMAX YP125R Service Manual page 244

CRANKSHAFT (YP250R) ........................................................................... 5-115
DISASSEMBLING THE CRANKCASE..................................................5-117
REMOVING THE CRANKSHAFT ASSEMBLY .....................................5-117
CHECKING THE TIMING CHAIN AND TIMING CHAIN GUIDE........... 5-118
CHECKING THE CRANKSHAFT AND CONNECTING ROD ...............5-118
CHECKING THE CRANKCASE ............................................................5-119
CHECKING THE BEARING AND OIL SEAL.........................................5-119
CHECKING THE OIL STRAINERS .......................................................5-119
INSTALLING THE CRANKSHAFT ........................................................5-119
ASSEMBLING THE CRANKCASE........................................................5-120