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Kawasaki KZ1300-A1 Quick Reference Manual Page 186

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MAINTENANCE--ENGINE
Cylinder Bearing Holes
CRANKSHAFT, CONNECTING RODS,
PRIMARY CHAIN
The
torsion
damper (also called vibration
damper)
is
installed on the left end of the crankshaft. The damper
absorbs torsional vibration
(oscillating twisting
motion)
of the crocked crankshaft, and prevents the crankshaft
from being subjected to intense stress, which
is
caused
if the damper is not installed
.
The torsion damper
consists of three
parts;
the
inner
part of the hub
CD
,
damper rubber
Q),
and
outer part of the rim
CD
.
The
torsion
damper absorbs twisting motion of the
crank-
shaft by vibrating the rim on the hub.
Crankshaft or connecting rod trouble, such as worn
crankshaft
journals
or a bent
connecting
rod, will
multiply the stress caused by
the
intermittent force on
the
pistons.
This results in not only rapid crankshaft
bearing wear, but also
noise,
power loss,
vibration,
and
shortened engine
life.
A defective
crankshaft
or connect-
ing
rod should always be detected at an early stage and
then replaced immediately.
The following explanation concerns the most
common
crankshaft
and
connecting rod problems, giving the
procedure for detecting damage and measuring wear
and runout.
Connecting
rod
big
end
side
clearance
Split the crankcase,
and
measure the side clearance
of the connecting
rod
big end with a thickness gauge
as shown
.
Replace
the crankshaft and the
connecting
rod
if
the clearance exceeds the service limit.
Table H40
Big End Side Clearance
Service
Limit
0.50 mm
Tonion Damper
1.
Rim
1. Water Pump Shaft
Bearings
2.
Water Pump Drive
Shaft
Bearing
3.
Water Pump
Drive
Bevel
Gear
Beari
ng
4.
Timing
Advancer
Shaft Bearing
2.
Damper Rubber
3. Hub
186

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