| MODEL | YAMAHA RZ 201 ROTARY CONCEPT 1972 |
| Year | 1972 |
| Engine Type | Twin-rotor Wankel (rotary), liquid cooled |
| Displacement / Capacity | 660 cc (2 x 330 cc) |
| Bore X Stroke | — |
| Compression Ratio | — |
| Cooling System | Liquid cooled |
| Max Power | 68 PS @ 6500 rpm |
| Max Torque | 7.8 kgf-m @ 4000 rpm |
| Ignition | CDI |
| Induction | — |
| Start System | Electric |
| TRANSMISSION SPECS | |
| Lubrication | Charge Cooled Rotor system (oil injected into mixture from the carburetor) |
| Gear Box | 5 speed |
| Clutch | — |
| Final Drive | Silent chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | — |
| Rear Suspension | — |
| Front Brakes | — |
| Rear Brakes | — |
| DIMENSION SPECS | |
| Overall Length | — |
| Overall Width | — |
| Overall Height | — |
| Seat Height | — |
| Wheelbase | 1485 mm |
| Ground Clearance | — |
| Dry Weight | 220 kg |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | — |
| Rear Tyre | — |
| FUEL SYSTEM | |
| Fuel Capacity | — |
| Fuel Consumption | — |
| Top Speed | — |
Yamaha's rotary concept shown at the 1972 Tokyo Motor Show, developed with Yanmar under an NSU licence. It used two counter-rotating rotors and a combined periphery/side port system, with oil injected into the mixture to lube and cool the rotors. It never reached series production, though its build quality led many to treat it as a prototype.
