VS
The 1973 Kawasaki F9 350 and 1971 BSA B50MX are both iconic 1970s enduros that defined their respective markets.
The 1973 Kawasaki F9 350 from Japan was powered by a 346cc 2-stroke single producing 36hp at 6500rpm. Weighing 140.0kg (309 lbs) and with a seat height of 850mm, it was aimed at enduro riders.
The 1971 BSA B50MX, hailing from United Kingdom, by contrast offered 499cc of OHV single power, delivering 34hp at 6000rpm. Tipping the scales at 149.0kg (328 lbs) with a top speed of 140km/h (87 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 1973 Kawasaki F9 350 from Japan was powered by a 346cc 2-stroke single producing 36hp at 6500rpm. Weighing 140.0kg (309 lbs) and with a seat height of 850mm, it was aimed at enduro riders.
The 1971 BSA B50MX, hailing from United Kingdom, by contrast offered 499cc of OHV single power, delivering 34hp at 6000rpm. Tipping the scales at 149.0kg (328 lbs) with a top speed of 140km/h (87 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
| 1973 Kawasaki F9 350 | 1971 BSA B50MX | |
|---|---|---|
| Displacement | 346 cc | 499 cc |
| Power | 36 hp | 34 hp |
| Torque | 35.0 Nm | 38.0 Nm |
| Cylinders | 1 | 1 |
| Top Speed | 145 km/h | 140 km/h |
| Quarter Mile | — | — |
| Dry Weight | 140.0 kg | 149.0 kg |
| Wet Weight | 152.0 kg | 161.0 kg |
| Seat Height | 850 mm | 830 mm |
| Wheelbase | 1380 mm | 1380 mm |
| Fuel Capacity | 11.0 L | 10.0 L |
| Gears | 5 -speed | 4 -speed |
The Verdict
For pure enduro performance, the 1973 Kawasaki F9 350 has the edge thanks to more power (36hp vs 34hp) and a higher top speed and lower weight. The 1971 BSA B50MX, however, excels when off-road capability and adventure riding is the priority. For collectors, the 1971 BSA B50MX commands more attention with a 5/10 collectibility rating. Parts availability is difficult for the 1973 Kawasaki F9 350 and moderate for the 1971 BSA B50MX — an important factor for any restoration project.
About the 1973 Kawasaki F9 350
The 1973 1973 Kawasaki F9 350 packs a 346cc 2-stroke single engine with 36hp into a dual-sport package from Kawasaki.
Full 1973 Kawasaki F9 350 Profile →About the 1971 BSA B50MX
Introduced in 1971, the 1971 BSA B50MX features a 499cc OHV single engine producing 34hp, establishing itself as a notable dual-sport.
Full 1971 BSA B50MX Profile →