Yamaha XS1100 (1979)

The Yamaha XS 1100F is a motorcycle model that was manufactured in 1979. It features a four stroke transverse four cylinder engine with a capacity of 1101 cc and a compression ratio of 9.2:1. The bike is equipped with 4x Mikuni BS 34SS carburettors and has a wet sump lubrication system. Ignition is done through TCI additional vacuum adjustment or an electric kick starter, which is separated from the engine for emergency mounting only. The maximum power output of the Yamaha XS 1100F is 95 hp/70.8 kW at 8500 rpm, with a torque of 9.2 kgf-m/66.5 lb-ft at 6500 rpm. The motorcycle has a wet, multi-disc clutch and a five-speed transmission.

The Yamaha XS 1100F has a telescopic fork front suspension with 175 mm/6.8 in of front wheel travel, and a dual shocks swing arm rear suspension with an 80mm/3.1 in rear wheel travel which is preload adjustable. Braking power comes from two 298mm discs in the front and a single 298mm disc in the rear. The motorcycle’s wet weight is 258kg/568.7 lbs, fuel capacity is 22 litres/5.8 gallons, and it has an average fuel consumption of 40.3 mpg.

The Yamaha XS 1100F also has a top speed of 126mph/202.8 km/h and is capable of completing the standing 1/4 mile in 11.7 seconds/114.2 mph 183.8km/h. Its braking distance from 100-0km/h is 39.7m. The Yamaha XS 1100F possesses a HY-VO chain and gear primary reduction system, and a shaft final drive. It has a 29.30° rake and 130mm/5.1in of trail. The front tyre is 3.50-19 and the rear tyre is 4.50-17.

Technical specifications:

Make Model: Yamaha XS 1100F

Year: 1979
Engine: Four stroke transverse four cylinder, DOHC, 2 valves per cylinder.
Capacity: 1101 cc / 67.2 cu-in
Bore x Stroke: 71.5 x 68.6 mm
Cooling System: Air cooled
Compression Ratio: 9.2:1
Induction: 4x Mikuni BS 34SS Carburettor
Lubrication: Wet sump
Ignition: TCI additional vacuum adjusted! / electric kick starter – Witch is separated from the engine, for emergency mounting only
Spark Plug: BP6ES (NGK) or N-8Y (Champion)
Battery: GM 18Z-3A / 12v, 20 AH
Generator: A.C. Generator, voltage regulator, rectifier
Starting: Electric
Max Power: 95 hp / 70.8 kW @ 8500 rpm
Max Torque: 9.2 kgf-m / 66.5 lb-ft @ 6500 rpm
Clutch: Wet, multi-disc (8 drive plates, 7 driven plates)
Transmission: 5 Speed
Primary Reduction System: HY-VO chain & gear
Primary Reduction Ratio: 25/25 x 58/35 = 1.657
Final Drive: Shaft
Gear Ratio: 1st 38/17 (2.235) 2nd 39/24 (1.625) 3rd 36/28 (1.286) 4th 32/31 (1.032) 5th 30/34 (0.882)
Front Suspension: Telescopic fork.
Front Wheel Travel: 175 mm / 6.8 in
Rear Suspension: Dual shocks Swing arm, preload adjustable
Rear Wheel Travel: 80 mm / 3.1 in
Front Brakes: 2x 298mm discs
Rear Brakes: Single 298mm disc
Front Tyre: 3.50-19
Rear Tyre: 4.50-17
Rake: 29 o 30
Trail: 130 mm / 5.1 in
Wet Weight: 258 kg / 568.7 lbs
Fuel Capacity: 22 Litres / 5.8 gal
Consumption Average: 40.3 mpg
Braking 100 – 0: 39.7 m
Standing 1/4 Mile: 11.7 sec / 114.2 mph 183.8 km/h
Top Speed: 126 mph / 202.8 km/h