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The 1974 Yamaha TX500 and 1978 Yamaha SR500 represent two chapters in Yamaha's storied history.
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 SR500 by contrast offered 499cc of SOHC single power, delivering 32hp at 6500rpm. Tipping the scales at 158.0kg (348 lbs) with a top speed of 145km/h (90 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 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 SR500 by contrast offered 499cc of SOHC single power, delivering 32hp at 6500rpm. Tipping the scales at 158.0kg (348 lbs) with a top speed of 145km/h (90 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 SR500 | |
|---|---|---|
| Displacement | 498 cc | 499 cc |
| Power | 48 hp | 32 hp |
| Torque | 40.0 Nm | 37.0 Nm |
| Cylinders | 2 | 1 |
| Top Speed | 170 km/h | 145 km/h |
| Quarter Mile | — | — |
| Dry Weight | 190.0 kg | 158.0 kg |
| Wet Weight | 206.0 kg | 172.0 kg |
| Seat Height | 800 mm | 800 mm |
| Wheelbase | 1400 mm | 1390 mm |
| Fuel Capacity | 13.0 L | 12.0 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 SR500 pushed output to 32hp. From a collector's perspective, the 1978 Yamaha SR500 holds the edge with a 7/10 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 SR500 — 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 SR500
The 1978 1978 Yamaha SR500 packs a 499cc SOHC single engine with 32hp into a standard motorcycle package from Yamaha.
Full 1978 Yamaha SR500 Profile →