The 1972 Honda CB350 Four from Japan was powered by a 347cc SOHC inline-4 producing 34hp at 9500rpm. Weighing 172.0kg (379 lbs) and with a seat height of 790mm, it was aimed at standard riders.
The 1973 Kawasaki Z1-900 RS by contrast offered 903cc of DOHC inline-4 power, delivering 82hp at 8500rpm. Tipping the scales at 230.0kg (507 lbs) with a top speed of 210km/h (130 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 Honda CB350 Four | 1973 Kawasaki Z1-900 RS | |
|---|---|---|
| Displacement | 347 cc | 903 cc |
| Power | 34 hp | 82 hp |
| Torque | 28.0 Nm | 73.0 Nm |
| Cylinders | 4 | 4 |
| Top Speed | 155 km/h | 210 km/h |
| Quarter Mile | — | — |
| Dry Weight | 172.0 kg | 230.0 kg |
| Wet Weight | 185.0 kg | 250.0 kg |
| Seat Height | 790 mm | 820 mm |
| Wheelbase | 1375 mm | 1490 mm |
| Fuel Capacity | 13.0 L | 18.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
For pure standard performance, the 1973 Kawasaki Z1-900 RS has the edge thanks to more power (82hp vs 34hp) and a higher top speed. The 1972 Honda CB350 Four, however, excels when all-round versatility and everyday riding is the priority. For collectors, the 1973 Kawasaki Z1-900 RS commands more attention with a 8/10 collectibility rating. Parts availability is good for the 1972 Honda CB350 Four and moderate for the 1973 Kawasaki Z1-900 RS — an important factor for any restoration project.
About the 1972 Honda CB350 Four
Honda released the 1972 Honda CB350 Four in 1972 with a 347cc SOHC inline-4 powerplant making 34hp — a definitive standard motorcycle.
Full 1972 Honda CB350 Four Profile →About the 1973 Kawasaki Z1-900 RS
Kawasaki released the 1973 Kawasaki Z1-900 RS in 1973 with a 903cc DOHC inline-4 powerplant making 82hp — a definitive standard motorcycle.
Full 1973 Kawasaki Z1-900 RS Profile →