Honda CB160 Shop Manual page 40

36 3. ENGINE
fig. 3. 95 Removing p'ston pin retainer
fig. 3. 96
l D
HEAD
--1
DIAMETER'-
I
2D
SECOND
TAPER DIA.
FIRST
TAPER DIA.
fig. 3. 97
Measuring pisto,/ o'rtiside diameter
fig. 3. 98 Measuring ring groove when o new piston
ring is fitted.
I. Disassembly
l . Remove the piston pin retainer from the removed
crankshaft and remove the piston pin.
(Refer to
3. 95)
2. When the piston pin is removed, attention should
be directed so that the ring is not twisted. !Em-
ployment of the piston ring tool is recommended.
(Refer to -Fig. 3. 96)
II. Inspection
l. Before cleaning, carbon adhering to the piston
head or sing groove should be removed with out
the piston being scarred.
(CAUTION)
Sandpaper should not be used
for
removing.
2. Measurement of outside diameter of the piston.
(Refer to Fig. 3. 97)
Standord value
Correction limit
Nead
mm
diometer
mm
Moximum
Dmm
diometer
Dmm
(CB 125, 1601
3. Measurement of the ring groove clearance when
a new piston ring is fitted.
(Refer to
Fig.
3. 98)
Stondard volue
Correction limit
Top
ring O.C4
to 0.07 mm
When over
(.00] 6
6
tO .0028
11
1
0.15 mm (.0060"1,
replocement
should be mode.
2nd ring
0.01 lo 0.04 mm
Same os obove
1.0004' to .00l6ul
Oil ring
0.01 to 0.04 mm
Sarne as ohove
(.0004" to .0016"1
!CB 125, 1601