Yamaha YR5 (1970)

The Yamaha YR5 is a 1970 model motorcycle with a two stroke, parallel twin engine and a capacity of 347 cc. It has a compression ratio of 6.9:1 and is air cooled, with induction via 2x 28mm Mikuni carburetors. The bike has a kick start and a maximum power of 36 hp at 7000 rpm, with a maximum torque output. The transmission has 5 speeds and the final drive is via chain. The frame is a tubular steel duplex cradle, with non-adjustable telescopic front forks and dual shock absorbers that are preload adjustable at the rear. The front and rear brakes are 183mm drums and have tyres of 3.00-18 and 3.50-18 respectively. The seat height is 790mm/31in and the wet weight is 150kg/330 lbs. Fuel capacity is 12 litres/3.1 gallons.

Technical specifications:

Make Model: Yamaha YR5

Year: 1970-
Engine: Two stroke, parallel twin
Capacity: 347 cc / 21.1 cu-in
Bore x Stroke: 64 54 mm
Compression Ratio: 6.9:1
Cooling System: Air cooled
Induction: 2x 28mm Mikuni carburetors
Ignition:
Starting: Kick
Max Power: 36 hp @ 7000 rpm
Max Torque:
Transmission: 5 Speed
Final Drive: Chain
Frame: Tubular steel duplex cradle
Front Suspension: Telescopic forks non adjustable.
Rear Suspension: Dual shock absorbers preload adjustable.
Front Brakes: 183mm drum
Rear Brakes: 183mm drum
Front Tyre: 3.00-18
Rear Tyre: 3.50-18
Seat Height: 790 mm / 31 in
Wet Weight: 150 kg / 330 lbs
Fuel Capacity: 12 Litres / 3.1 gal