| MODEL | YAMAHA R5-A 350 1970 |
| Year | 1970 |
| 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 | 7.5:1 |
| 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 | — |
| Overall Width | 739 mm / 29.1 in |
| Overall Height | — |
| Seat Height | 790 mm / 31.1 in |
| Wheelbase | 1341 mm / 52.8 in |
| Ground Clearance | 180 mm / 7.1 in |
| Dry Weight | 146 kg / 322 lbs |
| Wet Weight | 154 kg / 340 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 | 153 km/h / 95 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. This is the 1970 R5-A.
