Honda Z50A Manual page 21

19
B. Disassembly
1. Remove the cylinder head and cylinder in accordance with the procedure described
on page 9-10.
2. Remove the clutch assembly in accordance with the procedure described on page 16.
3. Remove the primary driven gear and the kick starter spring.
4 Remove the oil pump.
5. Remove the gear shift stopper and plate.
6. Loosen the left crankcase cover screws and then remove the cover. flywheel. stator
and the cam chain.
7. Pull off the rubber plug and remove the gear shift drum stopper bolt.
8. Remove the final drive sprocket.
9. Remove the right crankcase.
10.
Lift out the crankshaft assembly from the case.
C. Inspection
1. Measuring the crankshaft balance
Support the crankshaft on V-blocks at
the bearings. Rotate the crankshaft and
measure the amount of runout at both
ends of the crankshaft using a dial
gauge (Fig. 40).
Item !Standard_ Value1Serv1ceable
Left e11d. at 1 2
(30 mm) from the
l
Limit
weight O 0006
Right end, at 1 0
(O 015 mm)
(25 mm) from thel
weight
Repair 1f over
0.002 (0 05mm)
2. Measuring the connecting rod side play.
Measure the amount of connecting rod
side play using a thickness gauge (Fig.
41).
Standard Value
- - -
0 004-0 014
(0.1-0.35 mm)
3. Measuring the radial clearance of the
connecting rod large end bearing.
Measure the amount of c!earance at the
connecting rod large end by using a dial
gauge (Fig. 42).
Standard Value
0.0005 max.
(0.012 mm max.)
D. Reassembly
Serviceable Limit
Replace if over
0.002 (0.05 mm)
Perform the reassembly in the reverse order
of disassembly.
CD
Crankshaft
(2)
Dial gauge
Fig. 40
CD
Crankshaft
(2)
Connecting rod
@
Thickness gauge
Fig. 41
CD
Dial gauge
(2)
Connecting rod
Fig. 42