Yamaha SR500SP (1974-75)

The Yamaha SR 500 motorcycle was produced from 1974 to 1975 and had a four-stroke, single-cylinder, SOHC, and 2 valves per cylinder engine with a capacity of 499cc or 30.4 cu-in. It had a compression ratio of 9.0:1 and was air-cooled with a 34mm Mikuni VM34SS carburetor and CDI ignition. The motorcycle had kick-starting and had a maximum power output of 31.5 hp / 23.5 kW at 6500 rpm and 36.3 Nm / 26.8 lb-ft of torque at 5500 rpm. It had a 5-speed transmission and a chain final drive. The frame was half-duplex cradle, and it had a 35mm telescopic front suspension and a dual-shock 5-way adjustable spring preload rear suspension. The front brake was a single 200mm disc, and the rear brake was a 150mm drum with a 3.50 S19 front tire and a 4.00 S18 rear tire. The rake was 27.5 degrees with a trail of 117 mm / 4.6 in. The motorcycle had a width of 845 mm / 33.3 in, height of 1155 mm / 45.5 in, and a wheelbase of 1405 mm / 55.3 in with a seat height of 810 mm / 32 in. The dry weight was 158 kg / 348 lbs and the wet weight was 173 kg / 381.4 lbs. The fuel capacity was 12 Litres / 3.1 US gal, and it had an average consumption of 63 mpg with a standing 1/4 mile of 15.3 sec and a top speed of 95 mph / 152.8 km/h.

Technical specifications:

Make Model: Yamaha SR 500

Year: 1974 – 75
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