Yamaha R5 350 (1972)

The Yamaha R5-C 350 is a motorcycle that was released in 1972. It has a piston port two-stroke, parallel twin-cylinder engine with a capacity of 347cc. The bore and stroke are 64mm and 54mm, respectively, and it has a compression ratio of 6.9:1. The cooling system is air-cooled, and it uses oil injection. The bike has 2 Mikuni VM28 SC carburetors for induction and battery-powered, dual coils for ignition, with a kick start. It has a power output of 26.8 kW / 36 hp at 7000 rpm and a maximum torque of 37.9 Nm / 3.87 kgf-m / 28 ft-lb at 6500 rpm. The clutch is multi-plate and wet, and the transmission is five-speed. Its final drive is chain with gear ratios of 1st 18.37 / 2nd 11.40 / 3rd 8.55 / 4th 6.92 / 5th 5.78:1. The frame is a duplex cradle, and the front suspension is a telescopic fork with a swingarm as a rear suspension. The front and rear brakes are drum, with the front being twin leading shoe and the rear being single leading shoe. The front and rear tires are 3.00-18 and 3.50-18, respectively. The bike has a length of 2040mm, a width of 835mm, a height of 1085mm, and a wheelbase of 1320mm. The dry weight is 141kg, and the wet weight is 155kg. It has an oil capacity of 2.0L and a fuel capacity of 12L. It can travel at an average fuel consumption of 6.7 L/100 km, achieving a top speed of 160 km/h / 100 mph, with the ability to stop within 14 m/ 46 ft when braking from 50 km/h / 31 mph.

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Technical specifications:

Make Model: Yamaha R5-C 350

Year: 1972

Engine/frame Numbers: R5-100101 – 130606

Engine: Piston port two stroke, parallel twin cylinder.

Capacity: 347 cc / 21.2 cu in

Bore x Stroke: 64 54 mm

Compression Ratio: 6.9:1

Cooling System: Air cooled

Oil System: Oil injection

Induction: 2 x Mikuni VM28 SC carburetors

Ignition: Battery, dual coils, breaker points

Starting: Kick

Max Power: 26.8 kW / 36 hp @ 7000 rpm

Max Torque: 37.9 Nm / 3.87 kgf-m / 28 ft-lb @ 6500 rpm

Clutch: Multi-plate, wet

Transmission: 5 Speed

Final Drive: Chain

Gear Ratios: 1st 18.37 / 2nd 11.40 / 3rd 8.55 / 4th 6.92 / 5th 5.78:1

Frame: Duplex cradle frame

Front Suspension: Telescopic fork

Rear Suspension: Swingarm

Front Brakes: Drum, twin leading shoe

Rear Brakes: Drum, single leading shoe

Front Tyre: 3.00-18

Rear Tyre: 3.50-18

Dimensions: Length: 2040 mm / 80.3″ Width: 835 mm / 32.9″ Height: 1085 mm / 42.7″

Wheelbase: 1320 mm / 52.0″

Ground Clearance: 155 mm / 6.1″

Dry Weight: 141 kg / 311 lbs

Wet Weight: 155 kg / 343 lbs

Oil Capacity: 2.0 L / 4.2 US pts

Fuel Capacity: 12 L / 3.2 US gal

Average Fuel Consumption: 6.7 L/100 km / 14.9 km/l / 35 US mpg

Braking 50 km/h / 31 mph – 0: 14 m / 46 ft

Standing 1/4 Mile: 13.8 sec

Top Speed: 160 km/h / 100 mph

Source: Motorcycle Classics