Honda CB 125


Make Model

Honda CB 125 


1974 - 75


Four stroke, twin cylinder, OHC, 2 valve per cylinder


124 cc / 7.6 cu-in
Bore x Stroke 44 x 41 mm
Cooling System Air cooled
Compression Ratio 9.4:1


2x Keihin 22mm slide type manual choke


Battery & coil
Starting Kick

Max Power

15 hp / 10.9 kW @ 10500 rpm

Max Torque

1.05 kgf-m / 7.5 lb-ft @ 9000 rpm


5 Speed
Final Drive Chain

Front Suspension

Oil-damped telescopic forks

Rear Suspension

Dual shocks, swinging arm

Front Brakes


Rear Brakes


Front Tyre


Rear Tyre


Dry Weight

110 kg / 242.4  lbs

Wet Weight

133 kg / 295.4  lbs

Fuel Capacity 

10 Litres / 10.6 US gal

A bestseller for Honda in the early 1970s, the CB175 was designed to answer the criticisms of more sporting ride-to-workers who found the CD175 (introduced 1967-8) deficient as an adrenalin-rouser. Both were parallel twins but the CB had two carburettors, electric starting and five gears — which suggests what the CD specification was — and other assets such as a full cradle frame, two-leading-shoe front brake and a tachometer.

Power differential amounted to 3bhp, the respective figures being 16.5bhp/9,500rpm and 19.5bhp/ 10,000 rpm, the latter equivalent to 110bhp/litre which remains, in the 1980s, a creditable, not to say staggering, output.

Top speed for the CB was 80mph, at something over 10,000rpm. Both 175 models were sold concurrently, the CB at £60 over the 'cooking' version's price.

Sports CB175 twin had twin carburettors, abbreviated mudguards, smaller fuel tank and 2ls front brake