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Suzuki K50 model history
1967–2000

I have tried to tell the Suzuki K 50 model history on this page as I know it. The page is still under construction. 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.



In late sixties Suzuki discontinued the M12 and M15 and introduced the new Suzuki K50 model. It was a great success. In year 2000 it was still in production and available in shops in some parts of the world.

The K50 evolved from the 50cc M12 model. The first version still had the distinctive horse-shoe shaped head-lightlike most Suzuki bike models until early seventies. The earliest brochure with the export model of the K50/K50D I've seen was printed in February 1968.

The Suzuki K50 had a kick-starter, the K50D had electric starter.

Suzuki M12 and K50 mopeds were sold even in Sweden, although the Swedish law regulated the engine power to maximum one (1,0) bhp and the maximum speed limited to 30 km/h (18.64 mph).
While the Japanese K50 had a speedometer indicating range 0–120 km/h (0–80 mph), the Swedish moped speedo showed 0–50 km/h (0–31 mph). The Swedish model only had three speed gearbox.

The Scandinavian K50 model K50D did not have electric starter. Instead the ”D” indicatied that the model had disc brake at front wheel.


Suzuki K-50 K-50 '74 mopedSuzuki K-50 K-50 '74 moped


The original K50 was released in Japan in 1967. The export versions had double seats, the Japanese domestic version was always a “business bike” with a single seat and rear rack.
Over the years there were slight variations in the design but the K50 was marked by the slightly backswept handlebarsand since 1971 the red badge on the engine cover.

The first version had a different engine (see picture above) .

Throughout its 30-plus year production run there were various iterations – points ignition, 6-volt CDI, 12-volt, different exhausts etc. Production continued until 2000 with the simple, single-cylinder, air-cooled engine under the pressed steel frame.


Suzuki 1968More Suzuki models from 1968

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The first version of the K50 was introduced for the Japanese domestic market in 1967. It was a nice and sporty 50cc air-cooled 2-stroker. It had four speeds, drum brakes front and rear and a frame of pressed steel. The unrestricted model had 4,2 bhp power output and maximum speed of 80 km/h.
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K50-2 K50D-2 sales brochureK 50 1968
Overall Length: 1 785 mm (70.3 in)
Overall Width: 665 mm (26.2 in)
Overall Height: 9690 mm (37.8 in)
Wheelbase: 1 190 mm (46.9 in)
K50 Dry Weight: 70 kg (154 lbs)
K50D Dry Weight: 74 kg (162 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke, reed-valve. 4,2 hp (3,14 kW)/ 8,000rpm, 3,73 Nm (0,38 kg-m)/ 7,000rpm. 4 speeds.
Maximum Speed: 70 kph (44 mph)

Click on the image for larger format.
Here's even larger picture.


Suzuki 1969More Suzuki models from 1969


Suzuki 1970More Suzuki models from 1970


Suzuki 1971More Suzuki models from 1971
1971 Suzuki year code: R


The 1971 K50-II looked similar than its first version that was introduced a couple of years earlie but it got an all-new engine. It was a nice and sporty 50cc air-cooled 2-stroker with Reed valve. It had 3 speeds, drum brakes front and rear and a frame of pressed steel. The unrestricted model had 4,5 bhp power output and Posi-Force lubrication system.
K50-2 K50D-2 sales brochureK 50 1971
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke, reed-valve. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.
Maximum Speed: 70 kph (44 mph)

Click on the image for larger format.
Here's even larger picture.


Suzuki 1973More Suzuki models from 1973
1973 Suzuki year code: K


The 1973 K50K got a new gearbox with four gears. Exception from this is the Swedish model, that still hused the old gearbox with three gears.

Although the 1973 K50K had the same look as all the earlier model years in most parts of the world, the Swedish model (see the brochure scan below) was still based on the Suzuki AC50 instead. A bit confusing.

The Swedish version of the K50 used an engine with a restricted 1 bhp power output, according to Swedish laws. It didn't have the Posi-Force lubrication, the oil/fuel had to be mixed (4%) by the owners themselves.
K50 moped sales brochureK 50 1973 (Sweden)
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc
single-cylinder 2-stroke, 3 speeds. Maximum power: 1 hp,
maximum speed 30 km/h (Sweden).

Click on the image for larger format.
Here's even larger picture.


Suzuki 1974More Suzuki models from 1974
1974 Suzuki year code: L

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Suzuki K-50 K-50 '74 mopedK 50 1974
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke, reed-valve. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.
Maximum Speed: 70 kph (44 mph)

Click on the image for larger format.
Here's even larger picture.


Suzuki 1975More Suzuki models from 1975
1975 Suzuki year code: M

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Suzuki K-50 K-50 '74 mopedK 50 1975 (Japan)
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 78 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke, reed-valve. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.
Maximum Speed: 70 km/h (44 mph)

Click on the image for larger format.
Here's even larger picture.
'75 K50M SwedenK 50 1975 (Sweden)
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc
single-cylinder 2-stroke, 3 speeds. Maximum power: 1 hp,
maximum speed 30 km/h (Sweden).

Click on the image for larger format.

Suzuki 1976More Suzuki models from 1976
1976 Suzuki year code: A
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Suzuki K-50 K-50 '74 mopedK 50 1976 (Japan)
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 78 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke, reed-valve. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.
Maximum Speed: 70 km/h (44 mph)

Click on the image for larger format.
Here's even larger picture.



Suzuki 1978More Suzuki models from 1978
1978 Suzuki year code: C

As the picture from an Australian full-line catalog (the red one below) shows, the Australian version of the Suzuki K50 still had painted deep mudguards, a seat for two passengers and passenger footrests.
'78 K50C K-50 K50K 50 1978
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Wheelbase: 1 190 mm (46.9 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke, reed-valve. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.
Maximum Speed: 70 kph (44 mph)

Click on the image for larger format.
Here's even larger picture.


Suzuki 1979More Suzuki models from 1979
1979 Suzuki year code: N

Starting with the 1979-year's model the K50 was offered in two versions in Sweden; the K50N had drum brakes front and rear and the K50DN had a disc brake at the front.

Suzuki announced that the disc brake version had a special system to reduce the braking power to avoid locking the wheel. The disc brake was fully mechanical and self-adjusting.

The 1979-year's Swedish version of the Suzuki K50 looked practically the same as the previous year's model but had been improved in many details. The fuel tank was redesigned and the side covers were larger. The speedometer had been replaced to a larger one and the head light housing was new. According to Suzuki the changes were made to make the bike ”remaind more of a motorcycle”.

Also, the cylinder and the cylinder head were both new and even the Swedish model had now a Reed inlet valve. A lockable helmet holder was attached to the handlebar.

Colors: Red, Blue, Black.
Suzuki K50D med skicbromsK 50 1979
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.
Here's even larger picture.
Suzuki K50N utan skicbromsK 50 1979
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.
Suzuki K50K 50 1979
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.
Suzuki K50D med skicbromsK 50 D 1979
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.
Here's even larger picture.

1979 K50 specifications (Japan)

Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled single-cylinder 2-stroke, reed valve.
Cylinder volume: 49 cc
Power Output: 4,5 hp (3,3 kW)/ 7,000rpm
Torque: 5,0 Nm (0,52 kg-m)/ 5,000rpm
Bore x Stroke: 41 x 37,8 mm
Compression Ratio: 6,9:1
Starting system: kickstart
Lubricating System: wet sump
Transmission: 4 speed rotary
Front Brakes: drum
Rear brakes: drum
Front Tyre: 2.25-17
Rear Tyre: Tyre 2.25-17
Retail Price in Japan 1979: 106,000 Yen


Suzuki 1986More Suzuki models from 1986
1986 Suzuki year code: G
'86 K-50 K50GK 50 1986
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 990 mm (39.0 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 7,000rpm, 5,0 Nm (0,52 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.
Here's even larger picture.


Suzuki 2000More Suzuki models from 2000
2000 Suzuki year code: Y

The present K50 model was presented in January 2000 and has been unchanged since then (August 2002).
Suzuki K50 K-50 '00 mopedK 50 2000
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 1 010 mm (39.8 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 72 kg (158 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 6,500rpm, 5,4 Nm (0,5 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.


Suzuki 2002More Suzuki models from 2002
2002 Suzuki year code: K2
Suzuki K50 K-50 '02 mopedK 50 2002
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 1 010 mm (39.8 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 73 kg (161 lbs)
Engine type: Air-cooled 49 cc single-cylinder 2-stroke. 4,5 hp (3,3 kW)/ 6,500rpm, 5,4 Nm (0,5 kg-m)/ 5,000rpm. 4 speeds.

Click on the image for larger format.


2002 K50 specifications (Japan)

Model code: BB-BA15A
Overall Length: 1 815 mm (71.5 in)
Overall Width: 750 mm (29.5 in)
Overall Height: 1 010 mm (39.8 in)
Seat Height: 755 mm (29.7 in)
Wheelbase: 1 190 mm (46.9 in)
Ground Clearance: 135 mm (5.3 in)
Dry Weight: 73 kg (161 lbs)
Engine type: Air-cooled single cylinder 2-stroke
Cylinder volume: 49 cc
Power Output: 4,5 hp (3,3 kW)/ 6,500rpm
Torque: 5,4 Nm (0,5 kg-m)/ 5,000rpm
Bore x Stroke: 41 x 37,8 mm
Compression Ratio: 6,6:1
Starting system: kickstart
Lubricating System: wet sump
Transmission: 4 speed rotary
Front Brakes: drum
Rear brakes: drum
Front Tyre: 2.25-17 33L
Rear Tyre: Tyre 2.25-17 33L
Fuel Tank Capacity: 6,5 liter
Reserve: 1,2 liter
Retail Price in Japan 2002: 179,000 Yen






More: Suzuki K series


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Sources: Suzuki Motor Company etc.

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