The Yamaha YR-1 is a vintage motorcycle from 1967 which features a two stroke, parallel twin engine with a capacity of 347 cc. It has a compression ratio of 7.5:1 and is cooled by air. The bike is started with a kick and can reach a maximum power of 36.5 hp / 27.2 kW at 7500 rpm, with a maximum torque of 3.3 kg-m / 23.9 ft-lb at 7000 rpm. It has a 5-speed transmission and a chain final drive. The bike has drum brakes on both the front and rear wheels, and has a front suspension and a rear suspension. The dimensions of the bike are 2060mm in length, 735mm in width and 1000mm in height. It has a wheelbase of 1335mm and a ground clearance of 145mm. The bike weighs 157kg and has a fuel capacity of 15 litres/4.0 gallons.
Technical specifications:
Make Model: Yamaha YR-1
| Year | 1967 |
|---|---|
| Engine | Two stroke, parallel twin |
| Capacity | 347 cc / 21.1 cu-in |
| Bore x Stroke | 61 59.6 mm |
| Compression Ratio | 7.5:1 |
| Cooling System | Air cooled |
| Induction | Carburettor |
| Ignition | |
| Starting | Kick |
| Max Power | 36.5 hp / 27.2 kW @ 7500 rpm |
| Max Torque | 3.3 kg-m / 23.9 ft-lb @ 7000 rpm |
| Transmission | 5 Speed |
| Final Drive | Chain |
| Front Suspension | |
| Rear Suspension | |
| Front Brakes | Drum |
| Rear Brakes | Drum |
| Front Tyre | 3.00-18 |
| Rear Tyre | 3.50-18 |
| Dimensions | Length: 2060 mm / 81.1 in Width: 735 mm / 28.9 in Height: 1000 mm / 39.3 in |
| Wheelbase | 1335 mm / 52.5 in |
| Ground Clearance | 145 mm / 5.7 in |
| Weight | 157 kg / 346 lbs |
| Fuel Capacity | 15 Litres / 4.0 gal |
