The 1978 Yamaha XS650 Special from Japan was powered by a 654cc OHV twin producing 50hp at 7000rpm. Weighing 205.0kg (452 lbs) and with a seat height of 760mm, it was aimed at cruiser riders.
The 1936 Harley-Davidson EL Knucklehead, hailing from United States, by contrast offered 989cc of OHV V-twin Knucklehead power, delivering 40hp at 4800rpm. Tipping the scales at 245.0kg (540 lbs) with a top speed of 150km/h (93 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 Yamaha XS650 Special | 1936 Harley-Davidson EL Knucklehead | |
|---|---|---|
| Displacement | 654 cc | 989 cc |
| Power | 50 hp | 40 hp |
| Torque | 50.0 Nm | 70.0 Nm |
| Cylinders | 2 | 2 |
| Top Speed | 165 km/h | 150 km/h |
| Quarter Mile | — | — |
| Dry Weight | 205.0 kg | 245.0 kg |
| Wet Weight | 220.0 kg | 265.0 kg |
| Seat Height | 760 mm | 680 mm |
| Wheelbase | 1450 mm | 1500 mm |
| Fuel Capacity | 14.0 L | 14.0 L |
| Gears | 5 -speed | 4 -speed |
The Verdict
For pure cruiser performance, the 1978 Yamaha XS650 Special has the edge thanks to more power (50hp vs 40hp) and a higher top speed and lower weight. The 1936 Harley-Davidson EL Knucklehead, however, excels when relaxed highway cruising and long-distance comfort is the priority. For collectors, the 1936 Harley-Davidson EL Knucklehead commands more attention with a 10/10 collectibility rating. Parts availability is good for the 1978 Yamaha XS650 Special and difficult for the 1936 Harley-Davidson EL Knucklehead — an important factor for any restoration project.
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 →About the 1936 Harley-Davidson EL Knucklehead
Harley-Davidson released the 1936 Harley-Davidson EL Knucklehead in 1936 with a 989cc OHV V-twin Knucklehead powerplant making 40hp — a definitive cruiser.
Full 1936 Harley-Davidson EL Knucklehead Profile →