Dealers information at 24th January 1975
Honda (UK) Limited Registered No. 857969 London Registered Office:
Power Road, Chiswick London W4 5YT
TECHNICAL SPECIFICATION
CB400 F (FOUR)
ENGINE UNIT
Type: Air cooled, 4-stroke, O.H.C.
Cylinder Arrangement: Vertical four parallel
Bore and stroke: 51 x 50 mm
Capacity: 408 cc
Compression Ratio: 9.4 : 1
Carburetor: Keihin piston valve type
Venturi diameter 20mm. Main jet 75
Max. Horsepower: 37 B.H.P. at 8,500 r.p.m.
Max. Torque: 3.2 Kg.M at 7,500 r.p.m.
Oil capacity: 3.5 litre
Lubrication system: Forced and wet sump
Fuel required: 91 octane or higher
Air filtration: paper element
Valve clearance: 0.05 mm inlet and exhaust
Engine weight: 64kg (dry)
Air screw setting: 2 plus or minus a half
Idle speed: 1,200 r.p.m.
TRANSMISSION
Clutch: Wet multi-plate type
Gearbox: 6 speed constant mesh
Primary Reduction: 3.423
Gear Ratio 1 2.733
” ” 2 1.800
” ” 3 1.375
” ” 4 1.111
” ” 5 0.965
” ” 6 0.866
Final reduction: 2.235
drive sprocket 17T
driven sprocket 38T
ELECTRICAL SYSTEM
Ignition: Battery and coil
Starting: Starter motor and kick-starter
Alternator: A.C. Generator, output 156w at 5,000 r.p.m.
Battery: 12v. 12ah
Fuse capacity: 7 + 7 + 15 amp.
Spark plug: NGK. D-8ES-L
CYCLE PARTS
Overall length: 2035 mm
” width: 705 mm
” height: 1040 mm (not including rear mirror)
Wheel base: 1355 mm
Seat height: 795 mm
Ground clearance: 150 mm
Dry weight: 170kg
Curb weight: 183kg
Weight distribution: F/R 87/96 kg (at curb weight)
SUSPENSION
Frame: Semi-double cradle
Front suspension: Telescopic type, travel 114.5 mm
Rear ” : Swinging arm, ” 79 mm
Front tyre size: 3.00 S 18 4 pr. rib pattern
Rear ” ” : 3.50 S 18 4 pr. block pattern
Tyre pressure : front 1.8 kg/sq. cm
: rear 20 kg/sq. cm high speed )
> 25 kg/sq. cm high load )
Front brake pad swept area 38 sq. cm
Disc effective diameter 214 mm
Rear brake internal expanding
Lining swept area 70 sq. mm. Drum diameter 160 mm
Fuel capacity: 14 lit.
Reserve capacity: 3 lit.
Caster angle: 63 deg. 30 min.
Trail length: 85 mm
Front fork oil capacity: 160 – 165 cc dry, 145 cc Wet
Japanese Directors:- K. Kawashima N. Okamura T. Sumida (Sec.) K. Suzuki.