The 1972 Kawasaki H2 Mach IV from Japan was powered by a 748cc 2-stroke triple producing 74hp at 6800rpm. Weighing 192.0kg (423 lbs) and with a seat height of 810mm, it was aimed at standard riders.
The 1974 Kawasaki KZ400 by contrast offered 398cc of DOHC twin power, delivering 36hp at 8500rpm. Tipping the scales at 177.0kg (390 lbs) with a top speed of 155km/h (96 mph), it offered a distinct riding experience. 1970s bikes from the Japanese superbike revolution are increasingly sought after. Clean, original examples have seen significant value appreciation.
Specifications Comparison
| 1972 Kawasaki H2 Mach IV | 1974 Kawasaki KZ400 | |
|---|---|---|
| Displacement | 748 cc | 398 cc |
| Power | 74 hp | 36 hp |
| Torque | 68.0 Nm | 32.0 Nm |
| Cylinders | 3 | 2 |
| Top Speed | 210 km/h | 155 km/h |
| Quarter Mile | — | — |
| Dry Weight | 192.0 kg | 177.0 kg |
| Wet Weight | 210.0 kg | 192.0 kg |
| Seat Height | 810 mm | 800 mm |
| Wheelbase | 1420 mm | 1370 mm |
| Fuel Capacity | 16.0 L | 14.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
Comparing these two Kawasaki machines reveals the brand's evolution. The 1972 Kawasaki H2 Mach IV laid the groundwork with 74hp, while the later 1974 Kawasaki KZ400 pushed output to 36hp. From a collector's perspective, the 1972 Kawasaki H2 Mach IV holds the edge with a 9/10 rating. Either way, both are worthy additions to any Kawasaki collection. Parts availability is moderate for the 1972 Kawasaki H2 Mach IV and good for the 1974 Kawasaki KZ400 — an important factor for any restoration project.
About the 1972 Kawasaki H2 Mach IV
A standard motorcycle from 1972, the 1972 Kawasaki H2 Mach IV delivers 74hp from its 748cc 2-stroke triple engine.
Full 1972 Kawasaki H2 Mach IV Profile →About the 1974 Kawasaki KZ400
The 1974 1974 Kawasaki KZ400 is a 398cc twin-cylinder standard motorcycle that became one of Kawasaki's most memorable motorcycles of the 1970s.
Full 1974 Kawasaki KZ400 Profile →