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gear assembly (7) on the balance shaft ;
2. First install the balance driving gear (8) on
the left crank, then install the NC250 balance shaft
flat key (6) into the keyway of the crankshaft, and
then install the NC450 crankshaft timing sprocket
(9) on the left crank;
Notice:
When installing the balance master and
driven teeth, the timing marks of the
balance master and driven teeth should be
aligned, that is, the teeth with the timing
marks of the balance master and driven
teeth should mesh with each other.
3. Put the balance driving gear nut lock
washer (10) and the CB125 clutch disc washer
(11) on the crankshaft timing driving sprocket (9)
and the balance driven gear assembly (7)
respectively, and lock them on the balance shaft.
Nut M24
×
1(12) Clutch lock nut M16
×
1(13)
Apply 3~4 threads of thread tightening glue, then
install it on the crankshaft and balance shaft and
fasten it.
The tightening torque of the balance
driven gear lock nut: 80
～
90N
·
m, and the
tightening torque of the balance driven gear
lock nut: 115
～
125N
·
m.
Installation of the magneto rotor
1. One magneto semicircular key (14),
installed in the semicircular keyway of the
crankshaft;
2.
Install the magneto rotor (15) on the left
crank, then apply 3 to 4 threads of thread
tightening glue on the magneto nut (16), then
install it and the washer (17) on the left crank and
tighten.
Notice:
Tightening torque of magneto rotor lock
nut: 80
～
90N
·
m.
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