Yamaha xs650 (1977)

The 1977 Yamaha XS 650D is a vintage motorcycle with a four-stroke, parallel twin-cylinder engine. It has a capacity of 653 cc and a compression ratio of 8.4:1. The cooling system is air-cooled, while lubrication is through a wet sump. Induction is via two Mikuni BS38 carburetors while the ignition is powered by a battery and induction coil. It has both electric and kickstarting options. The bike has a maximum power output of 39.5 kW at 7200 rpm and torque of 54 Nm at 6800 rpm. It is equipped with a 5-speed transmission and a chain final drive. The suspension comprises of telescopic forks at the front and dual shock absorbers at the rear. It has twin hydraulic discs at the front and drum brakes at the rear, with a front tyre size of 3.50H-19 4PR and a rear tyre size of 4.00H-18 4PR. The bike has a length of 2175 mm, width of 780 mm, and height of 1090 mm with a wheelbase of 1435 mm. The seat height is 810 mm and ground clearance is 150 mm. It weighs 217 kg when wet and its fuel capacity is 15 litres with an average consumption of 5.0 L/100 km. The oil capacity is 2.5 litres while the top speed of the Yamaha XS 650D motorcycle is 185 km/h.

Technical specifications:

Make Model: Yamaha XS 650 / XS 650D

Year: 1977
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 BS38 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: Twin hydraulic discs, 267 mm
Rear Brakes: Drum
Front Tyre: 3.50H-19 4PR
Rear Tyre: 4.00H-18 4PR
Dimensions: Length: 2175 mm / 85.6″Width: 780 mm / 30.7″Height: 1090 mm / 42.9″
Wheelbase: 1435 mm / 56.5″
Ground Clearance: 150 mm / 5.5″
Seat Height: 810 mm / 31.9″
Dry Weight: 191 kg / 420 lbs
Wet Weight: 217 kg / 478 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