Yamaha 25BMH 30HMH Factory Service Manual, Page 252Get this manual
CRANKSHAFT AND CYLINDER BODY
CHECKING THE PISTON PINS AND SMALL-END BEARINGS
1Check: Piston pin Small-end bearing Heat discoloration ReplaceDamagescratches Replace
CRANKSHAFT AND CYLINDER BODY
CHECKING THE PISTON PINS AND SMALL-END BEARINGS
1Check: Piston pin Small-end bearing Heat discoloration ReplaceDamagescratches Replace