Kawasaki 125: history, specs, pictures

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Kawasaki 125
Also called 125 F 6, 125 KS
Production 1972 - 1974
single cylinder, two-stroke
Bore / Stroke 56.0mm x 50.6mm
Top Speed 68 mph (110 km/h)
Horsepower 12.74 HP (9.5 KW) @ 6500RPM
Transmission Gear box: 6-speed
Final Drive: chain
Brakes Front: expanding brake
Rear: expanding brake
Front Tire 2.75-21
Rear Tire 3.00-18
Weight 97.0 kg (wet)
Recommended Oil K-tech 10W-40
Fuel Capacity 1.98 Gallon (7.50 Liters)
Manuals Service Manual

The Kawasaki 125 KS was a single cylinder, two-stroke standard produced by Kawasaki between 1972 and 1974. It could reach a top speed of 68 mph (110 km/h). Claimed horsepower was 12.74 HP (9.5 KW) @ 6500 RPM.


The engine was a air cooled single cylinder, two-stroke. A 56.0mm bore x 50.6mm stroke result in a displacement of just 125.0 cubic centimeters. Fuel was supplied via a rotary valves.


The bike has a 6-speed transmission.


It came with a 2.75-21 front tire and a 3.00-18 rear tire. Stopping was achieved via expanding brake in the front and a expanding brake in the rear. The 125 KS was fitted with a 1.98 Gallon (7.50 Liters) fuel tank.