| MODEL | HONDA GOLD WING PROTOTYPE M1 1972 |
| Year | 1972 |
| Engine Type | Horizontally opposed six cylinder, longitudinal |
| Displacement / Capacity | 1470 cc / 89.7 cu in |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Liquid cooled |
| Max Power | 60 kW / 80 hp @ 6700 rpm |
| Max Torque | — |
| Ignition | — |
| Induction | — |
| Start System | — |
| TRANSMISSION SPECS | |
| Lubrication | — |
| Gear Box | — |
| Clutch | — |
| Final Drive | Shaft |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | — |
| Ground Clearance | — |
| Dry Weight | — |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | 220 km/h / 137 mph |
The M1 was an experimental grand-touring machine built in 1972 by a Honda team led by Soichiro Irimajiri. It used a liquid-cooled 1470 cc flat-six mounted lengthways with shaft drive, tuned for broad torque rather than peak power. It was never meant for production, and its cramped riding position pushed the team towards the more compact flat-four of the GL1000; the bike survives at Honda R&D.
