5-4
HOW
TO
REASSEMBLE
5-4-1
PRECAUTION IN REASSEMBLY
Every and each part should be cleaned thoroughly. Especially, pay utmost care and attention to the cleanliness of the
piston, cylinder, crankshaft, connecting rod and bearings.
Scrape completely off carbons from the cylinder head and the upper part of the piston; especially the carbon adhered
in the groove of the piston ring should be carefully and completely taken out.
Carefully check the lip portion
of
every oil seal.
If
faulty one is found, replace it without any hesitation.
Apply enough
oil
to the lip portion
of
the
oil
seal when reassembling.
Replace all the gaskets with new ones.
Replace the key, pin, bolt, nuts, etc. with new one, if necessary.
Whenever tightening torque is specified, conform
to
the specified figures.
Apply oil
to
the revolutionary parts and friction surfaces, when reassembling.
Check and adjust the clearances
of
various portions and then reassemble.
When some main portions are assembled in the course
of
reassembling, turn or move the gadgets by hand and pay at-
tention to the frictional noise and resistance.
5-4-2
MEASURING CRANKCASE and CRANKSHAFT
Bore the cylinder or take other steps as necessary
to
meet
the following specifications before reassembling.
EY35
E
Y40
I
W
(Crankshaft
Pin
Width)
I
29
+0.1
0
Bore
Piston Outside Diameter (In Skirt Thrust Direction)
78
dia.
40.019
I
84
dia.
,,
+0.022
I
Piston
to
Cylinder
at
Piston Skirt
Thrust
Face
I
0.049L
-
0.1
08L
1
0.049L
-
0.1
11
L
Piston Ring Gap (Top Ring
-
Second Ring)
I
Piston Ring Side Clearance in Grooves
(Top Ring
-
Second Ring)
Clearance between Connecting
Rod Large End and Piston Pin
and
Outside
Diameter
Clearance between Inside
Side
Clearance
0.1
L
-
0.3L
0.05
-
0.09
Clearance between Connection
Rod Small End and Piston Pin
Clearance between Piston Pin and Pinston Pin Hole
0.070
-
0.102L
0.020L
-
0.042L
0.1
L
-
0.4L
0.1
1T
-
0.01
1
L
r'
L:
LOOSE
Fig.
27
-
18
-
To Next Page
Loading...
