Service manual

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.