Suzuki GP125
1978—1981

I have tried to tell the Suzuki GP 125 model history on this page as I know it. I would be grateful of any contributions — sales brochures, magazine ads, magazine articles, pictures, specs, facts, corrections etc. Please scan the material in JPEG format (large enough that all the details are visible) and send them to me. Please tell me the source and the publication date if possible. If you send me pictures of your own bike, please follow these instructions.

1978 Suzuki GP-125 brochure (front page). Click to enlarge. I found this really nice scan on Internet. Untfortunately it's only the front page, the back side is missing. Please let me know if you find the opposite side.

1978 Suzuki year code: C

Suzuki GP125 was launched on the Japanese home market in March 1978. It was a low cost, economy version of the GT125/RG125 single two-stroke motorbike. The model name GP was apparently adopted from racing world (Grand Prix). The GP125 actually shared something with the 1976/1977 Suzuki RG500 works racer – both models had the same bore and stroke dimensions.

1978 Suzuki GP 125 Overall Length: 1 895 mm (74.6 in) Overall Width: 750 mm (29.5 in) Overall Height: 1 055 mm (41.5 in) Wheelbase: 1 235 mm (48.6 in) Dry Weight: 101 kg (222 lbs) Engine: Air-cooled 123 cc single cylinder 2-stroke, rotary disc valve. 15 hp (11 kW) @ 8 500 rpm, 13 Nm (1.3 kg-m) @ 7 500 rpm. 5-speed. Click on the image for larger format.

The biggest difference between the 1978 RG125/GT125 and the GP125 was that the RG had a twin engine with piston reed valves while the GP a single cylinder engine with rotary disk valves. Suzuki Motor Company continued to build the model couple of years into the 1980s, perhaps even longer for export to New Zealand.

1978-1979 GP125 specifications (Japan) Overall length: 1 895 mm (74.6 in.) Overall width: 750 mm (29.5 in.) Overall height: 1 055 mm (41.5 in.) Wheelbase: 1 235 mm (48.6 in.) Dry weight: 101 kg (222 lbs) Engine: Air-cooled 123 cc single cylinder 2-stroke, rotary valve. Maximum power output: 14 hp/ 8.000 rpm Maximum torque: 1,3 kpm/ 7.500 rpm Bore x stroke: 56,0 x 50,0 mm Compression ratio: 6.8 :1 Starting system: Kick starter Clutch type: Wet multi-plate Transmission type: 5-speed constant mesh Primary drive: chain Frame type: steel pipe Front suspension: Telescopic, oil dampened Rear suspension: Swinging arm, oil dampened Front brake: Single disc Rear brake: Internal expanding Front tyre: 2.75-18 Rear tyre: 3.00-18 Wheel type: steel rime, wire wheels Retail price, Japan 1979: 179,000 Yen 1978-1981 GP125 specifications (West Germany) Wheelbase: 1 230 mm (48.4 in.) Dry weight: 103 kg (227 lbs.) Engine: Air-cooled 123,2 cc single cylinder 2-stroke Maximum power output: 9,4 hp (7,2 kW)/ 8.000 rpm Maximum torque: 9,6 Nm/ 7.000 rpm Bore x stroke: 56,0 x 50,0 mm Carburettor: Mikuni VM 24 SS Transmission type: 5-speed constant mesh Primary drive: chain Frame type: steel (single) pipe Front suspension stroke: 100 mm (3.9 in) Rear suspension travel: 70 mm (2.8 in) Front brake: Single disc, 220 mm (8.7 in) Rear brake: Drum, 130 mm (5.1 in) Front tyre: 2.75-18 Rear tyre: 3.00-18 Fuel tank capacity: 9,8 liter Wheel type: steel rime, wire wheels Maximum speed: 110 km/h (68.35 mph)

1979 Suzuki year code: N

The 1979 Suzuki GP125 was presented for the Japanese home market in August 1979.

1979 Suzuki GP 125 Overall Length: 1 895 mm (74.6 in) Overall Width: 750 mm (29.5 in) Overall Height: 1 055 mm (41.5 in) Wheelbase: 1 235 mm (48.6 in) Dry Weight: 101 kg (222 lbs) Engine: Air-cooled 123 cc single cylinder 2-stroke. 14 hp @ 8 000 rpm, 13 Nm (1.3 kg-m) @ 7 500 rpm. 5-speed. Click on the image for larger format.

More: Suzuki GT and GP models

More: All Suzuki models

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