1993 Yamaha YFM80D Badger Supplementary Service Manual, Page 102Get this manual

1993 Yamaha YFM80D Badger Supplementary Service Manual, Page 102

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INSPECTION AND REPAIR 5.Lap:
Apply molybdenum disulfide oil to the valve stemInstall the valve into the cylinder head
Turn thevalve untilthevalvefceandvalve seat are evenly polished, then