Suzuki K90
1967–2000

I have tried to tell the Suzuki K 90 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.

1973 Suzuki K90-3, as shown in a Japanese dealer card

1973 Suzuki year code: K

Suzuki K90 featured a pressed backbone frame and a rotary disc valve engine, proven in the A90 model. According to Suzuki, the early models delivered high performance with a maximum output of 8.4 ps at 7,500 rpm and a top speed of 100 km/h. From 1970 on the peak power was a bit lower, 7.5 ps at 6,500 rpm. From start, a key feature of the K90 was the CCI lubrication system, which enabled continuous high-speed driving and made the pre-mixing of fuel and oil redundant. In terms of design, the K90 and A90 had similar fuel tanks.

1973 Suzuki K 90 Overall Length: 1 815 mm (71.5 in) Overall Width: 760 mm (29.9 in) Overall Height: 1 000 mm (39.4 in) Wheelbase: 1 185 mm (46.7 in) Ground Clearance: 130 mm ( 5.1 in) Dry Weight: 79 kg (174 lbs) Engine: Air-cooled 88 cc 1-cylinder 2-stroke, reed-valve. 7.5 hp (5.5 kW) @ 7 000 rpm, 7.75 Nm (0.95 kg-m) @ 5 000 rpm. 4 speeds Click on the image for larger format.

1975 Suzuki year code: M

1975 Suzuki K50, K90 and K125 sales brochure from Japan (4 pages). Click to enlarge. Printed in Japan, November 1974.

1975 Suzuki K 90 Overall Length: 1 815 mm (71.5 in) Overall Width: 760 mm (29.9 in) Overall Height: 1 000 mm (39.4 in) Wheelbase: 1 185 mm (46.7 in) Ground Clearance: 130 mm ( 5.1 in) Dry Weight: 79 kg (174 lbs) Engine: Air-cooled 88 cc 1-cylinder 2-stroke, reed-valve. 7.5 hp (5.5 kW) @ 7 000 rpm, 7.75 Nm (0.95 kg-m) @ 5 000 rpm. 4 speeds Click on the image for larger format.

1978 Suzuki year code: C

All the Suzuki K model received a facelift in 1978. Apart from cosmetic upgrades, the K90 remained unchanged until the model was terminated in year 2000.

The styling of the K90 was completely updated by changing the shape of the fuel tank and frame cover in 1978. All Suzuki's K models were redesigned that year. K90's 90 cm³ 2-stroke 1-cylinder reed valve engine was continuously equipped with the well-established air-cooled 2-cycle single-cylinder engine with a maximum output of 7.5 PS (reduced to 7.3 from 1987) and maximum torque of 9.3 Nm. The remodeled appearance of the K90 remained on sale until it was withdrawn from the market in 2000.

1978 Suzuki K 90 Overall Length: 1 815 mm (71.5 in) Overall Width: 760 mm (29.9 in) Overall Height: 1 000 mm (39.4 in) Wheelbase: 1 185 mm (46.7 in) Ground Clearance: 130 mm ( 5.1 in) Dry Weight: 80 kg (1746lbs) Engine: Air-cooled 88 cc 1-cylinder 2-stroke, reed-valve. 7.5 hp (5.5 kW) @ 7 000 rpm, 7.75 Nm (0.95 kg-m) @ 5 000 rpm. 4 speeds Here's even larger picture.

1996 Suzuki year code: T

1996 Suzuki K90 motorbike, photo sen by ”Namiki”. Click to enlarge.

More: Suzuki K series

More: All Suzuki models

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