Yamaha YR1 (1967)

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