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The 1978 Honda CBX and 1973 Kawasaki Z1-900 RS are both iconic 1970s standards that defined their respective markets.
The 1978 Honda CBX from Japan was powered by a 1047cc DOHC inline-6 producing 105hp at 9000rpm. Weighing 247.0kg (545 lbs) and with a seat height of 810mm, 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.
The 1978 Honda CBX from Japan was powered by a 1047cc DOHC inline-6 producing 105hp at 9000rpm. Weighing 247.0kg (545 lbs) and with a seat height of 810mm, 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
| 1978 Honda CBX | 1973 Kawasaki Z1-900 RS | |
|---|---|---|
| Displacement | 1047 cc | 903 cc |
| Power | 105 hp | 82 hp |
| Torque | 85.0 Nm | 73.0 Nm |
| Cylinders | 6 | 4 |
| Top Speed | 215 km/h | 210 km/h |
| Quarter Mile | — | — |
| Dry Weight | 247.0 kg | 230.0 kg |
| Wet Weight | 272.0 kg | 250.0 kg |
| Seat Height | 810 mm | 820 mm |
| Wheelbase | 1510 mm | 1490 mm |
| Fuel Capacity | 22.0 L | 18.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
For pure standard performance, the 1978 Honda CBX has the edge thanks to more power (105hp vs 82hp) and a higher top speed. The 1973 Kawasaki Z1-900 RS, however, excels when all-round versatility and everyday riding is the priority and offers a lighter package. Parts availability is good for the 1978 Honda CBX and moderate for the 1973 Kawasaki Z1-900 RS — an important factor for any restoration project.
About the 1978 Honda CBX
The 1978 1978 Honda CBX packs a 1047cc DOHC inline-6 engine with 105hp into a standard motorcycle package from Honda.
Full 1978 Honda CBX 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 →