Specifications - Yamaha EX440D Supplemental Service Manual

1980 EX440D
3. SPECIFICATIONS
NOTE:
* "".
New specification
(
General
(Compared with 1979 EX440C)
Model:
Mode l (I.B.M. No.) * EX440D (8J7)
Frame 1.0.
&
starting number
*
8J7-036101
Eng ine 1.0. & starting number
*
SS433-036101
Dimension:
Overa ll length 2 ,520 'mm (99.2 in)
Overall width (std) 980 mm (38.6 in)
Overall height (w/ w indsh ield) 995 mm (39.2 in)
Engine
Desc ription:
Eng ine type Fan coo led two-stroke 7 -port torque
induction, twin cylinders
Eng ine model SS433
Displacement 433 cc (26.42 cu.in)
Bore
X
Stroke
68
X
59 .6 mm (2.68
X
2.35 in)
Effective compress ion ratio 7.0: 1
Starti ng system Recoi l hand starter
Ignition system C.D.I.
Lubrication system "Auto lu be" oi l injection
Cylinder head:
Combustion chamber volume (with spark plug) 24.6 cc (1 .50 cu .in)
Compression chamber type Dome
+
Squ ish
Head gasket thickness 0.5 mm (0.02 in)
Cylinder:
Material Cast iron sleeves aluminum
Bore size 68 mm (2.677 in)
Taper lim it 0.05 mm (0.0020 in)
Out of rou nd limit 0.01 mm (0.0004 in)
Piston:
Piston skirt clearance (Measuring point) 0.045
~
0.050 mm (0.00 18
~
0 .0020 in)
l
(20 mm from piston skirt end)
Piston oversize 1 st 68.25 mm (2.687 in)
2nd 68.50 mm (2.697 in)
3rd 68.75 mm (2.707 in)
4th 69.00 mm (2 .717 in)
Piston pin outside diameter
X
length r/l18
X
55 mm (r/l0 .709
X
2.17 in)
Piston ring:
Piston ring design (Top)
Keystone
(2nd) Keystone
Ring end gap (insta ll ed) (Top) 0.35 ~ 0.55 mm (0.0 14 ~ 0.022 in)
(installed) (2nd) 0 .35
~
0.55 mm (0.014
~
0.022 in)
Smal l end bearing:
Type
Needle bearing
Big end bearing:
Type Needle bearing
Cra nkshaft:
Crankshaft assembly width (A) 174
±
0.1 mm (6.85
±
0.004 in)
(F)
+ 0
56
-0,05
+ 0
mm (2.205
-0.002
in)
Crankshaft deflection (D) 0.03 mm (0-1) 0 .04 mm (0-2)
0 .04 mm (0-3) 0.05 mm (0-4)
-5-