| MODEL | YAMAHA RS 100 1978 - 1979 |
| Year | 1978 - 1979 |
| Engine Type | Two-stroke, torque induction, single cylinder |
| Displacement / Capacity | 97 cc / 5.9 cu in |
| Bore X Stroke | 52 x 45.6 mm |
| Compression Ratio | 7.0:1 |
| Cooling System | Air cooled |
| Max Power | 8.1 kW / 11 hp @ 8500 rpm |
| Max Torque | 10.1 Nm / 1.03 kgf-m @ 700 rpm |
| Ignition | Magneto, CB/coil |
| Induction | VM20SH carburetor |
| Start System | Kick |
| TRANSMISSION SPECS | |
| Lubrication | Autolube |
| Gear Box | 5 speed |
| Clutch | Wet multiplate |
| Final Drive | Chain |
| CHASSIS SPECS | |
| Frame | — |
| Front Suspension | Telescopic forks |
| Rear Suspension | Dual shocks |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| DIMENSION SPECS | |
| Overall Length | 1945 mm / 76.5 in |
| Overall Width | 730 mm / 28.7 in |
| Overall Height | 1045 mm / 41.1 in |
| Seat Height | 775 mm / 30.5 in |
| Wheelbase | 1240 mm / 48.8 in |
| Ground Clearance | — |
| Dry Weight | 91 kg / 200.6 lb |
| Wet Weight | — |
| WHEEL SPECS | |
| Front Tyre | 2.75-18 |
| Rear Tyre | 3.00-18 |
| FUEL SYSTEM | |
| Fuel Capacity | 10 Litres / 2.6 US gal |
| Fuel Consumption | — |
| Top Speed | — |
A small 97 cc air-cooled two-stroke single with oil injection and a five-speed box, the RS 100 was a cheap, light commuter in Yamaha's lower range. It uses drum brakes at both ends and conventional telescopic forks with twin rear shocks. Aimed at everyday transport rather than sport.
