Suzuki K6A-YH6, Technical/Repair Manual, Page: 39 / 113

THEORY OF OPERATION
4-13
4
4.7 Cylinder Block and Lower
Crankcase
See Figure 4-14.
Figure 4-14
The cylinder block (1) is made of a lightweight aluminum
alloy. The cylinders contain press-fit, semi-wet style liners
for improved cooling and reliability.
The lower crankcase (2) is made of lightweight aluminum
alloy. The journal bearing caps are integrated into the
casting, which makes it possible to reduce weight,
improve rigidity, and suppress vibrating noise.
Crankshaft
See Figure 4-15.
Figure 4-15
The crankshaft (1) is constructed of cast iron. The
crankshaft has four main bearing journals and three rod
bearing journals, and is counterbalanced on rod throws 1
and 3 to reduce vibration. Each main journal contains a
two-piece main bearing (4 and 5), which is lubricated via
an oil hole (3). The third main journal contains a thrust
bearing (2). The front-mounted timing sprocket drives
both the timing chain and oil pump inner rotor. The
crankshaft pulley is equipped with a damper to reduce
vibration.
TN0496
1
2
TN0497, 0498
3
4
5
1
2