Yamaha R5 350 (1970)

The Yamaha R5-A 350 was a motorcycle produced in 1970 with an engine/frame number range of R5-000101 to 013649. Its engine was a piston port two-stroke, parallel twin cylinder with a 347 cc/21.2 cu in capacity, and its compression ratio was 7.5:1. The cooling system was air-cooled, and it utilized oil injection. It had two Mikuni VM28 SC carburetors for induction with battery-powered dual coils and breaker points for ignition. The motorcycle had a kick-start and a clutch system of multi-plate, wet. It had a 5-speed transmission with a chain final drive. The frame was a duplex cradle frame, and it had a telescopic fork front suspension and swingarm rear suspension. The braking system featured a drum, twin leading shoe for the front brakes and a drum, single leading shoe for the rear brakes. The wheels were 18 inches with a width of 739mm/29.1 inches, and it had a wheelbase of 1341 mm/52.8 inches. The seat height was 790 mm/31.1 inches, and the footpeg height was 234 mm/9.2 inches with a ground clearance of 180 mm/7.1 inches. The dry weight was 146 kg/322 lbs, and the wet weight was 154 kg/340 lbs with a fuel capacity of 12 L/3.2 US gal. On average, the fuel consumption of the motorcycle was 6.7 L/100 km, and its top speed was 153 km/h/95 mph, with a standing 1/4 mile of 15.5 seconds/130 km/h/81 mph. Its braking distance for 48 km/h/30 mph-0 was 11 m/36 ft, and for 97 km/h/60 mph-0, it was 37 km/121 ft.

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Technical specifications:

Make Model: Yamaha R5-A 350

Year: 1970

Engine/frame Numbers: R5-000101 – 013649

Engine: Piston port two stroke, parallel twin cylinder.

Capacity: 347 cc / 21.2 cu in

Bore x Stroke: 64 54 mm

Compression Ratio: 7.5:1

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 19.57 / 2nd 12.15 / 3rd 9.12 / 4th 7.38 / 5th 6.16:1

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: Width: 739 mm / 29.1″

Wheelbase: 1341 mm / 52.8″

Seat Height: 790 mm / 31.1″

Footpeg Height: 234 mm / 9.2″

Ground Clearance: 180 mm / 7.1″

Dry Weight: 146 kg / 322 lbs

Wet Weight: 154 kg / 340 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 48 km/h / 30 mph – 0: 11 m / 36 ft

Braking 97 km/h / 60 mph – 0: 37 km/ 121 ft

Standing 1/4 Mile: 15.5 sec / 130 km/h / 81 mph

Top Speed: 153 km/h / 95 mph

Source: Motorcycle Classics