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.

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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