The Yamaha XS1100SF Midnight Special motorcycle was introduced in 1981 and featured a four-stroke transverse four-cylinder engine with a capacity of 1101 cc. It had a compression ratio of 9.2:1 and was air-cooled. The bike had a maximum power output of 95 hp at 8500 rpm and maximum torque of 9.2 kgf-m at 6500 rpm. The ignition was TCI with an additional vacuum adjustment, and the bike had an electric kick starter that was separate from the engine and only for emergency use.
The XS1100SF had a wet sump lubrication system and was equipped with a wet, multi-disc clutch and a five-speed transmission. Its primary reduction system was HY-VO chain and gear with a primary reduction ratio of 1.657. The final drive was a shaft, and the bike featured five gear ratios.
The front suspension of the XS1100SF was a telescopic fork with a front wheel travel of 175 mm, while the rear suspension was dual shocks with a swing arm that was preload adjustable and had a rear wheel travel of 80 mm. The bike had front and rear disc brakes, with a front tire size of 3.50-19 and a rear tire size of 130/90-16.
The XS1100SF had a wet weight of 258 kg and a fuel capacity of 15 liters, with an average fuel consumption of 40.3 mpg. Its braking distance from 100 to 0 km/h was 39.7 m, and it could achieve a standing quarter-mile time of 11.7 seconds at 114.2 mph. The bike had a top speed of 126 mph.
Make Model: Yamaha XS 1100LH Midnight Special
Year: 1981
Engine: Four stroke transverse four cylinder, DOHC, 2 valves per cylinder.
Capacity: 1101 cc / 67.2 cu-in
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