Kawasaki S1 Mach I

Kawasaki S1 Mach I

1972 Kawasaki S1
Manufacturer Kawasaki
Parent company Kawasaki Heavy Industries
Production 1972-1975
Predecessor Kawasaki A1 Samurai
Successor Kawasaki KH250
Class Standard
Engine 249 cc Air-cooled 3-cylinder, two-stroke
Top speed 152-154 km/h (95-96 mph)
Power (1972)32bhp@8000rpm -(1974)28 bhp (33.5 kilowatts) @ 7500 rpm
Torque 30.7 lb-ft @ 7000 rpm
Transmission Chain driven 5-speed, 1 down-4 up pattern
Suspension Inner spring telescopic front fork, three-position spring preload adjustable shock absorber and swing arm (rear)
Wheelbase 54inch
Dimensions L: 79,5inch
W: 32,3inch
Seat height 31,5inch
Weight 339lb149.5 kg (330 lb) (dry)
348lb 160 kg (350 lb) (wet)
Fuel capacity 14 ltr. (3,2gallon)
Related Kawasaki S2 Mach II, Kawasaki H1 Mach III, Kawasaki H2 Mach IV

The Kawasaki Mach I (model designation S1) was a 250 cc (15 cu in) Kawasaki motorcycle made 1972 through 1975.

History

The Mach I was a direct result of the widespread success of the Kawasaki H1 Mach III 500 cc introduced in 1969. The Mach I's engine was a three-cylinder two-stroke with an engine displacement of 249 cc (15.1 cubic inches) which produced 32 bhp @ 8000 rpm, a power-to-weight ratio of 1 hp (0.75 kW) to every 11.8 pounds. The S1 Mach I replaced the twin Kawasaki A1 Samurai 250 with its twin-cylinder, Kawasaki rotary disc valve engine which produced 31 hp (23 kW) @ 8000 rpm.

The S1 Mach I emerged nearly one year after its bigger brother, the S2 Mach II 350, and from the development success of the Kawasaki H1 Mach III. It was essentially the same motorcycle as its larger brother with less displacement. It had a separate handlebar holder and steering friction damper. Its successor, the KH250, was essentially the same bike with a different name, was marketed from 1976 to 1981.

Notes

    References

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