Yamaha LB2 1978 - Specifications; General; Engine

7-2. SPECIFICATIONS
A. General
Model
1V8
Dimensions
Overall length
1,585 mm
Overall width
650mm
Wheelbase
1,050 mm
Minimum road clearance
135mm
Weight
Net
77 kg
Performance
Minimum turning radius
1,500 mm
B. Engine
Model
1V8
Engine:
Type
2-stroke, air cooled
Cylinder
Single, forward inclined
Displacement
49cc
Bore and stroke
40.0 mm x 39.7 mm
Compression ratio
5.4: 1
Starting system
Kick
Piston:
Piston
clearance
0.025 ~ 0.030 mm
Piston ring:
Piston end gap (installed) Top/2nd
0.15~ 0.35 mm
Crankshaft:
Crankshaft
assembly width (F)
37.990~ 37.995 mm
Crankshaft deflection (D)
0.03 mm or less
Connecting rod big end side
clearance
(C)
0.2 ...... 0.5 mm
Connecting rod small end
deflection (P)
o.s~2.o mm
1V9
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665mm
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1V9
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6.6: 1
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1F0(551),1F1
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130mm
75 kg
~
1F0(551).1F1
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1F2 (543)
1F2 (543)
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