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Yamaha Specifications

Yamaha XS1100SF Midnight Special (1980)

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Yamaha XS1100SF Midnight Special (1980)

At a glance

Capacity
1101 cc / 67.2 cu-in
Power
95 hp / 70.8 kW @ 8500 rpm
Torque
9.2 kgf-m / 66.5 lb-ft @ 6500 rpm

The full picture.

The Yamaha XS1100SF Midnight Special is a 1980 motorcycle with a four-stroke transverse four-cylinder engine, DOHC, and two valves per cylinder. It has a 1101 cc capacity and a compression ratio of 9.2:1. The bike uses 4 Mikuni BS 34SS Carburettors for induction and has a wet sump for lubrication. The ignition is TCI and has an electric kickstarter which is separate from the engine for emergency mounting only. The bike uses a wet multi-disc clutch and has a 5-speed transmission with a final drive shaft. The front suspension is a telescopic fork with 175 mm wheel travel and the rear suspension is dual shocks swing arm with preload adjustable and 80 mm wheel travel. The front brakes have 2x 298mm discs and the rear brake has a single 298mm disc. The bike has a 15 litre fuel capacity and can average 40.3 mpg. The Yamaha XS1100SF Midnight Special has a top speed of 126 mph and can cover a standing 1/4 mile in 11.7 seconds at a speed of 114.2 mph. The bike has a wet weight of 258 kg and a fuel consumption rate of 3.9 US gallons. Overall, it is a popular motorcycle with a max power output of 95 hp and a torque of 9.2 kgf-m.


Technical specifications:

Make Model: Yamaha XS 1100LG Special

Motorcycle technical specifications
Year1980
EngineFour stroke transverse four cylinder, DOHC, 2 valves per cylinder.
Capacity1101 cc / 67.2 cu-in
Bore x Stroke71.5 x 68.6 mm
Cooling SystemAir cooled
Compression Ratio9.2:1
Induction4x Mikuni BS 34SS Carburettor
LubricationWet sump
IgnitionTCI additional vacuum adjusted! / electric kick starter – Witch is separated from the engine, for emergency mounting only
Spark PlugBP6ES (NGK) or N-8Y (Champion)
BatteryGM 18Z-3A / 12v, 20 AH
GeneratorA.C. Generator, voltage regulator, rectifier
StartingElectric
Max Power95 hp / 70.8 kW @ 8500 rpm
Max Torque9.2 kgf-m / 66.5 lb-ft @ 6500 rpm
ClutchWet, multi-disc (8 drive plates, 7 driven plates)
Transmission5 Speed
Primary Reduction SystemHY-VO chain & gear
Primary Reduction Ratio25/25 x 58/35 = 1.657
Final DriveShaft
Gear Ratio1st 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 SuspensionTelescopic fork.
Front Wheel Travel175 mm / 6.8 in
Rear SuspensionDual shocks Swing arm, preload adjustable
Rear Wheel Travel80 mm / 3.1 in
Front Brakes2x 298mm discs
Rear BrakesSingle 298mm disc
Front Tyre3.50-19
Rear Tyre130/90 -16
Rake29 o 30
Trail130 mm / 5.1 in
Wet Weight258 kg / 568.7 lbs
Fuel Capacity15 Litres / 3.9 US gal
Consumption Average40.3 mpg
Braking 100 – 039.7 m
Standing 1/4 Mile11.7 sec / 114.2 mph 183.8 km/h
Top Speed126 mph / 202.8 km/h