1993 Yamaha YFM80D Badger Supplementary Service Manual, Page 107Get this manual

1993 Yamaha YFM80D Badger Supplementary Service Manual, Page 107

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INSPECTION AND REPAIR +Standard Cylinder
Oversize 2
Oversize A

47.50 mm (1.870 in) 48.00 rnm 11.890 in1

If out of the specification, replace the piston and piston