specs

CB750 K5: 1975

Production Dates May 1974 through December 1974
Production Numbers 35,000
Starting Frame# 2500001
Starting Engine# E2372115
Colors Planet Blue Metallic, Flake Apricot Red
Features The instrument faces were dark green. The speedometer numbers were increments of 10 (i.e., 10, 20, 30, 40, etc.).

Dimensions
Item English Metric
Overall length 85.6 in. 2,175 mm
Overall width 34.3 in. 870 mm
Overall height 46.1 in. 1,170 mm
Wheel base 57.3 in 1,455 mm
Seat height 31.9 in. 810 mm
Foot Peg Height 12.2 in. 310 mm
Ground Clearance 5.5 in. 140 mm
Curb weight (dry) 479 lb 218 kg

Frame & Suspension
Type Double cradle
Front Suspension Telescopic fork, travel 5.6 in., 143mm
Rear Suspension Swing arm, travel 3.3 in., 85mm
Front Tire Size, Type 3.25-19 (4PR) Rib tire, tire air pressure 2.0/2.25 kg/cm2, 28/32 psi
Rear Tire Size, Type 4.00-18 (4 PR) Block tire, tire air pressure 2.0/2.8 kg/cm2, 28/40 psi
Front Brake Disk brake
Rear Brake Internal expanding shoe
Fuel Capacity 4.5 US gal, 3.7 Imp. gal 17 liter
Fuel Reserve Capacity 1.3 US gal, 1.1 Imp. gal 5 liter
Caster Angle 63º
Trail Length 3.7 in. 95mm
Front fork oil capacity (refill) 5.3-5.4 ozs 155-160cc

Engine
Item English Metric
Type Air-cooled, 4-stroke, O.H.C. engine
Cylinder Arrangement 4-cylinder in line
Bore and Stroke 2.402x2.408 in. 61.0x63.0 mm
Displacement 44.9 cu in 736 cc
Compression Ratio 9.0:1
Carburetor, Venturi Diameter Four piston valve type, venturi diameter 28mm (1.102in)
Valve train Chain driven over head camshaft
Oil Capacity 3.7 US qt, 3.1 Imp. pt 3.5 liter
Lubrication System Forced pressure and dry sump
Fuel Required Low-lead gasoline with 91 octane number or higher
Air Filtration Paper filter
Valve Tappet Clearance Intake: 0.002in./0.05mm Exhaust: 0.003in./0.08mm
Air Screw Opening 1 turn
Idle speed 950 rpm

Gear ratio V
Drive Train
Clutch Wet, multi plate type
Transmission 5-speed, constant mesh
Primary reduction1.708
Gear ratio I 2.500
Gear ratio II 1.708
Gear ratio III 1.333
Gear ratio IV 1.097
0.939
Final Reduction 2.667, drive sprocket 18T, driven sprocket 48T
Gear shift pattern Left foot operated return system

Electrical
Ignition Battery and ignition coil
Starting system Electrical motor or kick pedal
Alternator Three phase A.C. generator 0.21kW@5,000 rpm
Battery Capacity 12V - 14AH
Fuse Capacity 15 amp
Spark plug NGK D8ES-L, NDX 24ES