Honda CB 125


Make Model

Honda CB 125 


1970 - 71


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


Wet Weight

133 kg / 295.4  lbs

Fuel Capacity 

10 Litres / 10.6 US gal

From 1968. when the early racy appearance of most Hondas was being exchanged for the more staid yet successful line exemplified by the CB250, some sub-250cc machines in the range were allowed to carry on with the original look. The 125SS of 1970. with a sohc engine inclined at 30° and mounted in a 'T-bone' frame, was one of these. Operating on a compression ratio of 9.4:1, with a Keihin vacuum-controlled carburettor, the engine would soar to 10,000rpm. which worked out to approximately 70mph; while it returned at least 80mpg at 50mph.