Yamaha 25BMH 30HMH Factory Service Manual, Page 184Get this manual
Quality of the image is intentionally reduced!
POWR CRANKSHAFT AND CYLINDER BODY 5-30 REMOVING THE CRANKSHAFT AND CYLINDER BODY 5-30 CHECKING THE CYLINDER BODY 5-31 CHECKING THE PISTON 5-32 CALCULATING THE PISTON-TO-CYLINDER CLEARANCE .5-33 CHECKI