Yamaha XS650 / XS-1F

Yamaha XS650 / XS-1F
Manufacturer	Yamaha
Production	1971
Class	Standard
Engine	Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder.
Compression ratio	8.4:1
Top Speed	185 km/h / 115 mph
Ignition	Battery, induction coil
Transmission	5 Speed
Suspension	Front: Telescopic forks Rear: Dual shock absorbers
Brakes	Front: Single disc Rear: Drum
Front Tire	3.50-19
Rear Tire	4.00-18
Wheelbase	1410 mm / 55.5"
Weight	185 kg / 408 lbs (dry),
Oil Capacity	3.0 Liters / 3.2 US qts
Recommended Oil	Yamalube 10w-40
Fuel Capacity	12.5 Liters / 3.3 US gal
Manuals	Service Manual

It could reach a top speed of 185 km/h / 115 mph.

Engine

The engine was a Air cooled cooled Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder.. The engine featured a 8.4:1 compression ratio.

Chassis

It came with a 3.50-19 front tire and a 4.00-18 rear tire. Stopping was achieved via Single disc in the front and a Drum in the rear. The front suspension was a Telescopic forks while the rear was equipped with a Dual shock absorbers. The XS650 / XS-1F was fitted with a 12.5 Liters / 3.3 US gal fuel tank. The bike weighed just 185 kg / 408 lbs. The wheelbase was 1410 mm / 55.5" long.

Photos

Overview

Yamaha XS 650 (XS-1F)

Following a decade when Japanese motor cycles for export were styled to appeal almost exclusively to American tastes, with European riders having no option but to tolerate the high, wide handlebars and other hallmarks, external and internal, of the US-orientated motor cycle, Yamaha made a significant change in their marketing policy. From the mid-1970s they began to take some account of the market in Europe, beginning with modifications to the established XS650 twin on the advice of tester-turned-racer Percy Tait. The XS650 was first exported in 1973. It cashed in on its similarity to the British-tinguished from the original by its all black leading-axle front fork. It was first sold in made vertical twins that had gained a loyal postwar following not only in the UK but also in North America, where Triumph enjoyed world-record status from their speed dashes over the Salt Lake Flats of Utah. As the British factories disappeared until finally only Triumph, in diminished form, was left, the XS650 took over as a readily available twin exhibiting the old British virtues of power and straight-forward design, plus one or two of its own — notably, more rugged construction, greater reliability and, ultimately, enhanced power. Its popularity in the arduous sport of sidecar moto-cross is testimony to its robust design. As a road bike it showed parallels, welcome or otherwise, with the British twins, not least in vibration carried to the rider and to other less durable impedimenta such as bulbs, nuts and bolts, which shattered or loosened with clockwork regularity. Uprated over the years with front disc brakes in place of drum, and in some applications having cast-aluminum wheels, the XS650 began the 1980s in Europe in SE form, which entailed a throwback to US styling and a depressed price tag that made it something of a bargain buy in comparison with contemporary Triumphs.

Make Model	Yamaha XS 650 (XS-1F)
Year	1971
Engine Type	Four stroke, parallel twin cylinder, SOHC, 2 valves per cylinder.
Displacement	653 cc / 39.8 cu in
Bore X Stroke	75 x 74 mm
Compression	8.4:1
Cooling System	Air cooled
Lubrication	Wet sump
Induction	2 x Mikuni BS38 carburetors
Ignition	Battery, induction coil
Starting	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 Tire	3.50-19
Rear Tire	4.00-18
Dimensions	Length: 2175 mm / 85.6"Width: 905 mm / 35.0"Height: 1135 mm / 44.7"
Wheelbase	1410 mm / 55.5"
Ground Clearance	150 mm / 5.5"
Dry Weight	185 kg / 408 lbs
Fuel Capacity	12.5 Liters / 3.3 US gal
Oil Capacity	3.0 Liters / 3.2 US qts
Top Speed	185 km/h / 115 mph