Kawasaki H2 Mach IV
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| Manufacturer | Kawasaki |
|---|---|
| Parent company | Kawasaki Heavy Industries |
| Production | 1972–1975 |
| Predecessor | None |
| Successor | Kawasaki Z750 |
| Class | Standard street |
| Engine | 748 cc Air-cooled, oil injected, 3-cylinder, transverse, two-stroke |
| Power | 74 hp (55 kilowatts) @ 6800 rpm |
| Torque | 7.9Kg-m @ 6500 rpm |
| Transmission | Chain driven, 5-speed 5up |
| Suspension | Inner spring telescopic front fork, three-position spring preload adjustable shock absorber and swing arm (rear) |
| Wheelbase | 1,410 mm (56 in) |
| Seat height | 800 mm (31.5 in) |
| Weight | 192 kg (423 lb) (dry) |
| Fuel capacity | 16.73 l (3.68 imp gal; 4.42 US gal) |
| Related | Kawasaki S1 Mach I, Kawasaki S2 Mach II, Kawasaki H1 Mach III |
The Kawasaki H2 Mach IV was a 750 cc 3-cylinder two-stroke production motorcycle manufactured by Kawasaki. The H2 was a Kawasaki triple sold from September 1971 through 1975.
It became known as "The King of the Streets". A standard, factory produced H2 was able to travel a quarter mile from a standing start in 12.0 seconds. It handled better than the Mach III that preceded it. By the standards of its time, its handling was sufficient to make it the production bike to beat on the race track. Nonetheless, its tendency to pull wheelies and a less than solid feel through high speed corners led to adjustments to the design as it evolved. More than any other model, it created Kawasaki's reputation for building what motorcycle journalist Alastair Walker called, "scarily fast, good-looking, no holds barred motorcycles", and led to a further decline in the market place of the British motorcycle industry.
In September 1971 the H2 was a direct result of the success of the 500 cc Kawasaki H1 Mach III introduced in 1969. The H2 engine was a 3-cylinder two-stroke with an engine displacement of 748 cc (45.6 cubic inches) which produced 74 horsepower (55 kW) at 6,800 rpm, a power-to-weight ratio of 1 hp (0.75 kW) to every 5.7 lb (2.6 kg) of weight. This was an entirely new engine and not a bored-out 500. Unlike the H1 500, the 750 had much more low engine speed torque, with a strong burst of power starting at 3,500 rpm to the 7,500 rpm red line.
The 1972 H2 came with a single front disc brake, a second disc brake was an optional Kawasaki part, an all-new capacitor discharge ignition system unique to the H2, a chain oiler, a steering friction damper and a hydraulic one .
In 1973, there were minor mechanical changes made to the carburetor jets, oil injection pump and cylinder port timing in an effort by the factory to get more MPG from the H2A. The most powerful H2 were the 1971 the very early 1972 models.
In 1974 the H2B engine was modified for more civilized performance at the expense of raw power. The race tail was slimmed down from the previous year. An oil-based steering damper and check valve were added. The power was reduced to 71 horsepower (53 kW) at 6,800 rpm. The oil injection system was substantially changed with two separate sets of injection lines, unlike the earlier models with one set of lines. Oil was injected into the carburetors on a separate line with a branch to each carburetor. The oil injection to the bottom end bearings (both main and rod big ends) was retained as a set of three separate lines as before. A longer swingarm improved stability. The final model had a weight of 208 kilograms (459 lb).
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