Yamaha YB50, Service Manual

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GEN/
INFO
IMPORTANT INFORMATION
1-2
IMPORTANT INFORMATION
CHANGE OF ALL PARTS
1. We recommend that original Yamaha parts
are used as spare parts. Use the oil and/or
grease recommended by Yamaha for
assembly and adjustment.
GASKETS, OIL SEALS AND O-RINGS
1. All gaskets and o-rings should be replaced
when the engine is overhauled and repaired.
All gasket surfaces, the lips of seals and o-
rings should be cleaned.
2. Lubricate with grease all corresponding
parts and bearings during assembly. Apply
grease on the lips of seals.
SEALING WASHER/PLATES AND KEYS
1. All washers/plates and keys should be
replaced when they are removed. The loc-
king tabs should be folded along the flat
parts of the bolts or nuts after correctly tigh-
tening them.
BEARINGS AND OIL SEALS
1. Install the bearings and oil seals with
their manufacturer’s marks or numbers
facing outwards (i.e. the printed letters
should on the side exposed to view). When
the oil seals are installed, apply a thin layer
of light lithium-based grease on the edges
of the seal. Put oil on the bearings when
they are installed.
ATTENTION:
Do not turn the bearings in compressed air
to dry them. This will damage the surface
of the bearings.