Kawasaki S1 Mach I
Encyclopedia
The Kawasaki Mach I was a 250 cc Kawasaki motorcycle
made 1972 through 1975.
with its twin-cylinder, Kawasaki rotary disc valve
engine which produced 31 hp @ 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 and being just 9.97 kg (22 pounds) lighter in weight. It had a separate handlebar holder and steering friction damper.
Motorcycle
A motorcycle is a single-track, two-wheeled motor vehicle. Motorcycles vary considerably depending on the task for which they are designed, such as long distance travel, navigating congested urban traffic, cruising, sport and racing, or off-road conditions.Motorcycles are one of the most...
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 3-cylinder two-stroke with a engine displacement of 249 cc (15.1 cubic inches) which produced 28 hp @ 8000 rpm, a power-to-weight ratio of 1 hp to every 11.8 pounds. The S2 Mach II replaced the twin Kawasaki A1 Samurai 250Kawasaki A1 Samurai
The A1 Samurai was a production motorcycle made by Kawasaki. It was a standard or Universal Japanese motorcycle sold in the US and abroad from 1967 through 1971.-Development:...
with its twin-cylinder, Kawasaki rotary disc valve
Rotary valve
A rotary valve is a type of valve in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes. The common stopcock is the simplest form of rotary valve...
engine which produced 31 hp @ 8000 rpm.
The S1 Mach I emerged nearly one year after its bigger brother, the S2 Mach II 350
Kawasaki S2 Mach II
The Kawasaki Mach II was a Kawasaki standard motorcycle, made from 1972 through 1973.-History:The Mach II was a direct result of the widespread success of the Kawasaki H1 Mach III 500 cc introduced in 1969. The Mach II's engine was a 3-cylinder two-stroke with an engine displacement of...
and from the development success of the Kawasaki H1 Mach III
Kawasaki H1 Mach III
The Kawasaki H1 Mach III was a high-performance two-stroke 500cc production motorcycle manufactured by Kawasaki Motorcycle Corporation. It was sold in the U.S. and abroad from 1969 through 1975.-History:...
. It was essentially the same motorcycle as its larger brother with less displacement and being just 9.97 kg (22 pounds) lighter in weight. It had a separate handlebar holder and steering friction damper.
Competitors
Competitors, horsepower, power-to-weight ratio, and 0-60 mph.- Kawasaki S1 Mach I 28 hp, power-to-weight ratio of 1:11.8 Standing start 0-60 mph 6.8 seconds.
- Honda CB250Honda CB250The Nighthawk 250 is a standard Honda motorcycle. It features a air-cooled parallel twin engine. First manufactured in 1982, the motorcycle has changed little except for color....
30 hp, power-to-weight ratio: 1:12.5 Standing start 0-60 mph 7.2 seconds. - Suzuki GT250Suzuki GT seriesThe Suzuki GT series of motorcycles was introduced to the world in the fall of 1971 as 1972 model year motorcycles. The final MY of production was 1977 although some markets continued to receive the GT380 to the end of the 1980 MY...
30.5 hp, power-to-weight ratio: 1:11 Standing start 0-60 mph 6.5 seconds. - Yamaha R5 F 35 hp, power-to-weight ratio: 1:93 Standing start 0-60 mph of 5.3 seconds.
S1 v. Kawasaki A1
- Horsepower: S2 Mach I @ 28 hp v. A1 Samurai @ 31 hp.
- Speed: S1 Mach 1 0-60 mph in 6.8 seconds v. A1 Samurai 0-60 mph 6.2 sec.
- Top speed: S1 Mach I 96 mi/h v. A1 Samurai 99.4 mi/h
- Weight: S2 @ 331 lb (150.1 kg). A1 @ 340 lb (154.2 kg)
- Power-to-weight ratio: S1 Mach I @ 1:11.7 v. A1 Samurai @ 1:11