Yamaha SXV70SJ Supplementary Service Manual - Spec
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MAINTENANCE SPECIFICATIONS
SPEC
a
MAINTENANCE SPECIFICATIONS
ENGINE
Model
SXV70SJ/ VT70J
Cylinder head:
Volume (with spark plug)
#1: 24.55
X 24.85 cm
3
(1.50
X 1.52 cu.in)
#2, #3: 21.35
X 21.65 cm
3
(1.30
X 1.32 cu.in)
*Lines indicate straight edge measurement.
Cylinder:
Material
Bore size
Aluminum alloy with dispersion coating
69.000
X 69.014 mm (2.7165 X 2.7171 in)
Piston:
Piston size (D)
Measuring point
Piston to-cylinder clearance
Piston offset
Piston offset direction
Piston pin bore inside diameter
68.927
X 68.930 mm (2.7137 X 2.7138 in)
10 mm (0.39 in)
0.070
X 0.075 mm (0.0028 X 0.0030 in)
0.75 mm (0.0295 in)
EX side
20.004
X 20.015 mm (0.7876 X 0.7880 in)
Piston pin:
Piston pin outside diameter
Piston pin length
19.995
X 20.000 mm (0.7872 X 0.7874 in)
55.7
X 56.0 mm (2.193 X 2.205 in)
Piston ring:
Sectional sketch
Top Ring
2nd Ring
End gap (installed)
Top Ring
2nd Ring
Side clearance
Top Ring
2nd Ring
Coating
Top Ring
2nd Ring
Keystone
B = 1.20 mm (0.047 in)
T = 2.75 mm (0.108 in)
Keystone
B = 1.20 mm (0.047 in)
T = 2.75 mm (0.108 in)
0.35
X 0.55 mm (0.014 X 0.022 in)
0.35
X 0.55 mm (0.014 X 0.022 in)
0.02
X 0.06 mm (0.0008 X 0.0024 in)
0.02
X 0.06 mm (0.0008 X 0.0024 in)
Chrome plated / Parkerrizing
Chrome plated / Parkerrizing