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CB25ü Addendum
Cvlinder/Piston
Item
Cylinder I.D.
out of round
taper
warpage
Piston mark direction
Pisto n O.D.
(O)
Piston O.D. measurement point (H)
Piston pin hole I.D. (d)
(d)
Cylinder-to-piston clearance
Pisten pin O.D.
Piston-to-piston pin clearancé
Connectinq rod-to-piston
pin
clearance
Top ring-to-ring groove clearance
Second ring-to-ring groove c1earance
Top ring end gap
Second ring end gap
Oil ring (side rail) end gap
Top ring mark
Second ring mark
-
Crankshaft
Connecting rod small end I.D.
Connecting rod bigendside clearancs
radial clé arance -
Crankshah runout
(at
both ends)
G)
(at bearing holder)
@
b
G)
39.5
mm
(1.56
in)
U
.
IJ
l'9.5
mm
(0.37
in)
Crank pin oil clearance
Crank pin bearing selection
Main journal oil clearance
Main journal bearing
selsction
Standard
53.000 - 53.010 (2.0866 - 2.0870)
"IN" mark facing toward the intake side
52.970 - 52.990 (2.0854 - 2.0862)
10
mm
(0.4
in) from the bottom
15.002 - 15.008 (0.5906 - 0.5909)
0.010 - 0.040 (0.0004 - 0.0016)
14:994 - 15.000 (0.5903 - 0.5906)
0.002 - 0.014(0.0001 - 0.0006)
0.016 - 0.040 (0;0006 - 0.0016)
0.015 - 0.040 (0.0006 - 0.0016)
0.015 -0.040(0.0006 - 0.0016)
0.15 - 0.30 (0.006 - 0.012) .
0.30 - 0.45 (0.012 - 0.018)
0.2 - 0.7 (0,01 - O.03)
"N".mark side facing up
"N" markside facing up
15.016 - 15.034 {0.59
J
2 - 0.5919)
0.10-0.40 (0.004-0.016)
0,004 - 0.012 (0.0002 - 0.0005)
.""
Unit: mm (in)
Service Limit
53.10 (2.091)
0.05 (0.002)
0.05 (0.002)
0.05(0.002)
52.90 (2.083)
15.05 (0.593)
0.10 (0.004)
14.98 (0.590)
0.07 (0.003)
0.10 (0.004)
0.10 (0.004)
0.10 (0.004)
0.45(0.018)
0.60 (0.024)
0.90 (0.036)
15.08 (0.594)
0.6 (0;02)
0.05 (0.002)
0.03 (0.001)
0.05 (0.002)
..
-
Kickstarter
--------'--------'-------,-----------~----~-,------
Kickstarterpinion gear I.D.
Kickstarter spindle O.D.
Kickstarter id le gear I.D.
Countershah O.D. at kickstarter id le gear
Kickstarter id le gearbushing O.D.
I.D.
19-6
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