Yamaha SR500 (1978-79)

The Yamaha SR500 (1978-79) motorcycle has a four-stroke, single-cylinder, SOHC engine with a capacity of 499cc/30.4 cu-in. It has a compression ratio of 9.0:1 and an induction system with a 34mm Mikuni VM34SS carburetor. The bike has a maximum power output of 31.5 hp/23.5 kW at 6500 rpm and a maximum torque of 36.3 Nm/26.8 lb-ft at 5500 rpm. The SR500 has a five-speed transmission and a chain final drive. The frame is a half-duplex cradle with a 35mm telescopic fork front suspension and a dual shock, 5-way adjustable spring preload rear suspension. The bike has a single 200mm disc front brake and a 150mm drum rear brake. The front and rear tire sizes are 3.50 S19 and 4.00 S18, respectively. The SR500 has a rake of 27.5 degrees and a trail of 117mm/4.6in. The dimensions of the bike are a width of 845mm/33.3in, a height of 1155mm/45.5in, and a wheelbase of 1405mm/55.3in. The seat height is 810mm/32in, the dry weight is 158kg/348lbs, and the wet weight is 173kg/381.4lbs. The fuel capacity is 12 liters/3.1 US gallons, and the bike has an average consumption of 63 mpg. It can do a standing 1/4 mile in 15.3 seconds and has a top speed of 95 mph/152.8 km/h.

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Technical specifications:

Make Model: Yamaha SR 500

Year: 1978 – 79

Engine: Four stroke, single cylinder, SOHC, 2 valves per cylinder.

Capacity: 499 cc / 30.4 cu-in

Bore x Stroke: 87 84 mm

Cooling System: Air cooled

Compression Ratio: 9.0:1

Oil Capacity: 2.4 Litres

Induction: 34mm Mikuni VM34SS carburetor

Ignition: CDI

Starting: Kick

Max Power: 31.5 hp / 23.5 kW @ 6500 rpm

Max Torque: 36.3 Nm / 26.8 lb-ft @ 5500 rpm

Transmission: 5 Speed

Final Drive: Chain

Frame: Half-duplex cradle

Front Suspension: 35mm telescopic forks

Front Wheel Travel: 150 mm / 5.9 in

Rear Suspension: Dual shock, 5-way adjustable spring preload.

Rear Wheel Travel: 105 mm / 4.1 in

Front Brakes: Single 200mm disc

Rear Brakes: 150mm drum

Front Tyre: 3.50 S19

Rear Tyre: 4.00 S18

Rake: 27.5 degrees

Trail: 117 mm / 4.6 in

Dimensions: Width 845 mm / 33.3 in Height 1155 mm / 45.5 in

Wheelbase: 1405 mm / 55.3 in

Seat Height: 810 mm / 32 in

Dry Weight: 158 kg / 348 lbs

Wet Weight: 173 kg / 381.4 lbs

Fuel Capacity: 12 Litres / 3.1 US gal

Consumption Average: 63 mpg

Standing 1/4 Mile: 15.3 sec

Top Speed: 95 mph / 152.8 km/h