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.


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

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