Yamaha 25BMH 30HMH Factory Service Manual, Page 254Get this manual
CRANKSHAFT AND CYLINDER BODY
4Check: Free play (when piston pin is in place of the piston)There should be no noticeable playFree play exists Replace the pin andor piston
CRANKSHAFT AND CYLINDER BODY
4Check: Free play (when piston pin is in place of the piston)There should be no noticeable playFree play exists Replace the pin andor piston