The 1974 Yamaha TX500 from Japan was powered by a 498cc DOHC twin producing 48hp at 8500rpm. Weighing 190.0kg (419 lbs) and with a seat height of 800mm, it was aimed at standard riders.
The 1978 Yamaha XS650 Special by contrast offered 654cc of OHV twin power, delivering 50hp at 7000rpm. Tipping the scales at 205.0kg (452 lbs) with a top speed of 165km/h (103 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
| 1974 Yamaha TX500 | 1978 Yamaha XS650 Special | |
|---|---|---|
| Displacement | 498 cc | 654 cc |
| Power | 48 hp | 50 hp |
| Torque | 40.0 Nm | 50.0 Nm |
| Cylinders | 2 | 2 |
| Top Speed | 170 km/h | 165 km/h |
| Quarter Mile | — | — |
| Dry Weight | 190.0 kg | 205.0 kg |
| Wet Weight | 206.0 kg | 220.0 kg |
| Seat Height | 800 mm | 760 mm |
| Wheelbase | 1400 mm | 1450 mm |
| Fuel Capacity | 13.0 L | 14.0 L |
| Gears | 5 -speed | 5 -speed |
The Verdict
Comparing these two Yamaha machines reveals the brand's evolution. The 1974 Yamaha TX500 laid the groundwork with 48hp, while the later 1978 Yamaha XS650 Special pushed output to 50hp. From a collector's perspective, the 1978 Yamaha XS650 Special holds the edge with a 5/10 rating. Either way, both are worthy additions to any Yamaha collection. Parts availability is moderate for the 1974 Yamaha TX500 and good for the 1978 Yamaha XS650 Special — an important factor for any restoration project.
About the 1974 Yamaha TX500
Yamaha released the 1974 Yamaha TX500 in 1974 with a 498cc DOHC twin powerplant making 48hp — a definitive standard motorcycle.
Full 1974 Yamaha TX500 Profile →About the 1978 Yamaha XS650 Special
The 1978 1978 Yamaha XS650 Special is a 654cc twin-cylinder cruiser that became one of Yamaha's most memorable motorcycles of the 1970s.
Full 1978 Yamaha XS650 Special Profile →