The 1975 Kawasaki KH500 from Japan was powered by a 498cc 2-stroke triple producing 52hp at 7000rpm. Weighing 183.0kg (403 lbs) and with a seat height of 800mm, it was aimed at standard riders.
The 1978 Kawasaki Z1-R by contrast offered 1015cc of DOHC inline-4 power, delivering 90hp at 8000rpm. Tipping the scales at 240.0kg (529 lbs) with a top speed of 215km/h (134 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
| 1975 Kawasaki KH500 | 1978 Kawasaki Z1-R | |
|---|---|---|
| Displacement | 498 cc | 1015 cc |
| Power | 52 hp | 90 hp |
| Torque | 46.0 Nm | 82.0 Nm |
| Cylinders | 3 | 4 |
| Top Speed | 175 km/h | 215 km/h |
| Quarter Mile | — | — |
| Dry Weight | 183.0 kg | 240.0 kg |
| Wet Weight | 198.0 kg | 260.0 kg |
| Seat Height | 800 mm | 810 mm |
| Wheelbase | 1395 mm | 1505 mm |
| Fuel Capacity | 15.0 L | 19.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
Comparing these two Kawasaki machines reveals the brand's evolution. The 1975 Kawasaki KH500 laid the groundwork with 52hp, while the later 1978 Kawasaki Z1-R pushed output to 90hp. From a collector's perspective, the 1978 Kawasaki Z1-R holds the edge with a 8/10 rating. Either way, both are worthy additions to any Kawasaki collection. Parts availability is moderate for the 1975 Kawasaki KH500 and good for the 1978 Kawasaki Z1-R — an important factor for any restoration project.
About the 1975 Kawasaki KH500
The 1975 1975 Kawasaki KH500 is a 498cc triple-cylinder standard motorcycle that became one of Kawasaki's most memorable motorcycles of the 1970s.
Full 1975 Kawasaki KH500 Profile →About the 1978 Kawasaki Z1-R
Kawasaki released the 1978 Kawasaki Z1-R in 1978 with a 1015cc DOHC inline-4 powerplant making 90hp — a definitive cafe racer.
Full 1978 Kawasaki Z1-R Profile →