Categories: Yamaha

Yamaha TX650 III (1975-76)

The Yamaha TX650 III motorcycle was produced between 1975-76 and had a four-stroke, parallel twin-cylinder engine with a capacity of 653cc. It featured a compression ratio of 8.4:1, air-cooled system, wet sump lubrication, and induction through two Mikuni carburetors. The ignition system consisted of a battery and induction coil, and the bike had both electric and kick start options. The maximum power output was 39.5 kW (53 hp) at 7200 rpm, with a peak torque of 54 Nm (39.8 lb-ft) at 6800 rpm. The bike had a five-speed transmission and a chain final drive. Suspension included telescopic forks on the front and dual shock absorbers at the back. Braking was provided by a single disc on the front and a drum on the rear, with 3.50H-19 4PR and 4.00H-18 4PR tires on the front and rear respectively. The machine had a wheelbase of 1435mm (56.5″) and measures 2179mm (85.8”) in length, 899mm (35.4”) in width, and 1161mm (45.7”) in height, with a dry weight of 191kg (420lbs). The fuel tank capacity was 15 liters (4.0 US gal) and average consumption was recorded at 5.0 L/100 km (47 US mpg). The bike had a top speed of 185 km/h (115 mph) and an oil capacity of 2.5 Liters (2.6 US qts).


Technical specifications:

Make Model: Yamaha XS 650 / TX 650A

Year: 1975 – 76

Engine: Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder.

Capacity: 653 cc / 39.8 cu in



Bore x Stroke: 75 x 74 mm

Compression Ratio: 8.4:1

Cooling System: Air cooled

Lubrication: Wet sump

Induction: 2 x Mikuni carburetors

Ignition: Battery, induction coil

Starting: Electric and kick

Max Power: 39.5 kW / 53 hp @ 7200 rpm

Max Torque: 54 Nm / 5.5 kgf-m / 39.8 lb-ft @ 6800 rpm

Transmission: 5 Speed

Final Drive: Chain

Front Suspension: Telescopic forks

Rear Suspension: Dual shock absorbers


Front Brakes: Single disc

Rear Brakes: Drum

Front Tyre: 3.50H-19 4PR

Rear Tyre: 4.00H-18 4PR

Dimensions: Length: 2179 mm / 85.8″Width: 899 mm / 35.4″Height: 1161 mm / 45.7″

Wheelbase: 1435 mm / 56.5″

Ground Clearance: 150 mm / 5.5″

Dry Weight: 191 kg / 420 lbs

Fuel Capacity: 15 Litres / 4.0 US gal

Average Consumption: 5.0 L/100 km / 20 km/l / 47 US mpg


Oil Capacity: 2.5 Litres / 2.6 US qts

Top Speed: 185 km/h / 115 mph

Related links: xs650.org.au
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