Crankshaft, Connecting Rods, And Pistons - Honda CB160 Shop Manual

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3. 8 CRANKSHAFT, CONNECTING RODS, AND PISTONS
6. Remove the 6 X 35 bolt at the lower crankcase
front section.
7. Pull out gently and in line with the crankcase.
8. Assembly is the reverse order of disassembly.
3. 8 Crankshaft, connecting rods, and pistons
A. Description of crankshaft
The right and left crankshafts are
of
carbon steel
and the counterweights are of nickel-chrome molybde-
num steel. Each crankshaft is constructed by press
inserting the counterweight into the crankshaft. The
center crankshaft is press inserted and coupled. The
crankshaft is supported at four points, one ball bearing
and three roller bearings. The sprocket of the cam
chain is cut in the crankshaft and drives the cam shaft.
(Refer to Fig. 3. 84)
All bearings are secured to the crankcase by guide
pins. In the center crank outer ring, an oil hole which
matches the oil hole of the upper crankcase is the
guide ; the guide is in the form of a pipe.
Oil pumped by the oil pump is divided at the
center crank outer ring oil hole ; one supply lubricates
the roller bearing and the other is stored in the cuta-
way of the counterweight side surface for feeding ·
from the weight cutaway groove to the interior of
the crank pin by centrifugal force. This lubricates the
crankshaft end of the conneging rod. (Refer to Fig.
3. 85)
I.
Disassembly
1. Drain oil from the crankcase.
2.
Separate the cylinder head and cylinder.
3.
Separate the left and right crankcase cover.
4.
Separate the AC generator and clutch oil pump.
5.
Hence, disassembly of the crankcase is performed
by following Section 3.
5
E.
fig. 3. 84 Crankshaft
fig. 3. 85 Crankshaft lubricating passage
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