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Historical CB750 K4 Technical Specifications
The following information is taken from the Honda Motorcycle Guide.
1 9 7 4
|
Model
Year: 1974 |
Frame
#: CB750-2300001 |
Engine
#: CB750E-2300001 |
Colors:
Boss Maroon Metallic, Flake Sunrise Orange, Freedom
Green Metallic |
Remarks:
The gas tank stripes were white, gold and black
and were wider than previous years. The speedometer
showed increments of 20. 5-speed transmission.
4 into 4 exhaust system. |
|
|
|
Standard
Size |
Metric
Size |
|
Dimensions |
|
|
|
Overall
length |
85.0
in. |
2,160
mm |
|
Overall
width |
34.8
in. |
885
mm |
|
Overall
height |
45.5
in. |
1,155
mm |
|
Wheel
base |
57.3
in. |
1,455
mm |
|
Seat
height |
31.5
in. |
800
mm |
|
Foot
peg height |
12.2
in. |
310
mm |
|
Ground
Clearance |
5.5
in. |
160
mm |
|
Curb
weight |
517.3
lb |
235
kg |
|
Weight
distribution L/R |
271.1/209.5
lb |
123/205
kg |
|
Frame |
|
|
|
Type |
Dbl
cradle tubular steel |
|
|
F.
Suspension, travel |
5.6
in. |
143
mm |
telescopic
fork |
R.
Suspension, travel |
3.3
in. |
85
mm |
Swing
arm |
F.
Tire pressure, size |
28
psi |
2.0
kg/cm2 |
3.25-19
(4 PR) |
R.
Tire pressure, size |
28
psi |
2.0
kg/cm2 |
4.00-18
(4 PR) |
F.
Brake, lining area |
2.9
in2x 2 |
53
cm2x2 |
Disk
brake |
R.
Brake, lining area |
8.2
in2x 2 |
53
cm2x2 |
Internal
expanding shoe |
Fuel
Capacity |
4.7
US gal, 3.9 Imp. gal |
18
liter |
|
Fuel
Reserve Capacity |
1.3
US gal, 1.1 Imp. gal |
5
liter |
|
Caster
Angle |
63
? |
|
|
Trail
Length |
3.74
in. |
95
mm |
|
Front
Fork oil capacity |
7.0-7.3
oz |
220-230
cc |
|
Engine |
|
|
|
Type |
Air
cooled,
inline four cylinder, four stroke, sohc |
|
|
Bore
and Stroke |
2.401
x 2.408 in. |
61
x 63 mm |
|
Displacement |
44.93
cu in |
736
cc |
|
Compression
Ratio |
9.0
: 1 |
|
|
Maximum
Horsepower |
67
BHP@8,000 rpm |
|
|
Maximum
Torque |
44.12
lb-ft@7,000 rpm |
6.1
kg-m@7,000 rpm |
|
Carburetor,
Venturi Dia. |
4x28mm
Keihin,
slide type |
|
|
Valve
train |
Chain
driven
overhead camshaft |
|
|
Oil
Capacity |
7.39
US pt, 6.16
Imp. pt |
3.5
liter |
|
Oil
Tank Capacity |
4.22
US pt.,
3.55 Imp. pt |
2
liter |
|
Lubrication
System |
Forced
pressure
and dry sump |
|
|
Air
filtration |
Paper
element |
|
|
Valve
Tappet Clearance |
In:
0.002 in.,
Ex: 0.003 in. |
In:0.05
mm,
Ex:0.08 mm |
|
Engine
weight (Wet) |
176.3
lb |
80
kg |
|
Air
screw opening |
1
1/8 turn |
|
|
Idle
speed |
900
rpm |
|
|
Main
jet |
#120 |
|
|
Idle
jet |
#40 |
|
|
Air
jet |
#100 |
|
|
Carb
main bore |
1.102
in. |
28
mm |
|
Drive
Train |
|
|
|
Clutch |
Wet,
multi-plate |
|
|
Transmission |
5-speed,
constant mesh |
|
|
Gear
Ratio I |
2.500:1 |
|
|
Gear
Ratio II |
1.708:1 |
|
|
Gear
Ratio III |
1.333:1 |
|
|
Gear
Ratio IV |
1.097:1 |
|
|
Gear
Ratio V |
0.939:1 |
|
|
Primary
reduction |
1.708:1 |
|
|
Secondary
reduction |
1.167:1 |
|
|
Final
Reduction |
2.667:1
(18T x 48T) |
|
|
Electrical |
|
|
|
Type |
12v,
negative earth |
|
|
Ignition |
Coil
and contact
breaker, spare spark |
|
|
Starting
system |
Electrical
motor
and kick pedal |
|
|
Alternator |
3-phase
12 V
0.21kW@5,000 rpm |
|
|
Battery
Capacity |
12V
- 14 amp hour |
|
|
Spark
plug |
NGK
D-8ES |
|
|
Spark
plug gap |
0.024
~ 0.028 in. |
0.6
~ 0.7 mm |
|
Point
gap |
0.012
~ 0.016 in. |
0.3
~ 0.4 mm |
|
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