48
Install crankshaft
Inductively heat bearing hole of crankshaft
on left crankcase to (130
～
150)
℃
, and
then slightly press crankshaft into crankcase.
Turn and check flexibility of crankshaft.
The right end of crankshaft face upwards,
and sufficiently drop oil into oil hole at right
end, and slowly turn the connecting rod
until oil overflow from both sides of bigger
end of connecting rod.
Install transmission system
Match up main and counter shaft first,
and then install into crankcase together.
Install gearshift drum
Install forks, and insert forks into main
and counter shaft, and put fork pin into
line shaped groove of gearshift drum.
Pay attention to mark on forks, and no
wrong installation is allowed.
Aline holes on each fork, and insert
axle of forks through the holes.
Turn and check flexibility of main and
counter shaft, in case poor flexibility is
found, re-installation and repeats of
steps above is needed.
Install balancing shaft
Aline guiding direction by key first, and
press and install driven gear group on
balancing shaft; And aline marks of
matching up on driving and driven gears,
and then install balancing shaft into crankcase.
Alignment mark