| MODEL | YAMAHA R5-C 350 1972 |
| Year | 1972 |
| Engine Type | Piston port two stroke, parallel twin cylinder |
| Displacement / Capacity | 347 cc / 21.2 cu in |
| Bore X Stroke | 64 x 54 mm |
| Compression Ratio | 6.9:1 |
| Cooling System | Air cooled |
| Max Power | 26.8 kW / 36 hp @ 7000 rpm |
| Max Torque | 37.9 Nm / 3.87 kgf-m / 28 ft-lb @ 6500 rpm |
| Ignition | Battery, dual coils, breaker points |
| Induction | 2 x Mikuni VM28 SC carburetors |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Oil injection |
| Gear Box | 5 speed |
| Clutch | Multi-plate, wet |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | Duplex cradle frame |
| Front Suspension | Telescopic fork |
| Rear Suspension | Swingarm |
| Front Brakes | Drum, twin leading shoe |
| Rear Brakes | Drum, single leading shoe |
| DIMENSION SPECS | |
| Overall Length | 2040 mm / 80.3 in |
| Overall Width | 835 mm / 32.9 in |
| Overall Height | 1085 mm / 42.7 in |
| Seat Height | — |
| Wheelbase | 1320 mm / 52.0 in |
| Ground Clearance | 155 mm / 6.1 in |
| Dry Weight | 141 kg / 311 lbs |
| Wet Weight | 155 kg / 343 lbs |
| WHEEL SPECS | |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 12 Litres / 3.2 US gal |
| Fuel Consumption | 6.7 L/100 km / 35 US mpg |
| Top Speed | 160 km/h / 100 mph |
The R5 350 was Yamaha's top two-stroke road bike of the early 1970s, an air-cooled piston-port parallel twin with a five-speed box and drum brakes. Its 36 hp matched the previous year's twin, but it pulled more strongly low down, giving usable power from around 3,000 rpm. It was the forerunner of the RD350. The 1972 R5-C ran a lower compression ratio and revised gearing compared with the earlier two years.
