Engineered by Yamaha for the sport touring motorcycle segment, the 1979 Yamaha XS 1100 utilizes a 1101 cc (67.2 cu in) air-cooled in-line four, four-stroke layout. In factory specification, peak output is rated at 95 HP (69.3 kW) at 8,500 rpm while maximum torque reaches 66 Nm (48.7 lb-ft) at 6,500 rpm, transferring power to the rear wheel through a 5-speed gearbox and shaft drive (cardan) final drive. With a specific output of 86.3 HP per liter and a 2,000 rpm working window between peak torque (6,500 rpm) and peak power (8,500 rpm), the engine character is indicating a tractable, stress-free state of tune focused on everyday usability and broad torque delivery.
On the scales, the XS 1100 measures 286 kg (631 lbs) wet (curb), translating to a power-to-weight ratio of 0.33 HP/kg (3.01 kg per horsepower). Rider ergonomics and chassis geometry center around a 810 mm (31.9 in) seat height — offering a neutral standover height that accommodates most average-inseam riders without sacrificing cornering clearance. The 24-liter (6.3 US gal) fuel tank supports practical everyday commuting and weekend road stints, while factory top speed is listed at 215 km/h (134 mph).
Within MotoLibrary's Yamaha archive, this model family spans 5 indexed model years from 1978 to 1982, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Specific Output
86.3 HP/L
Power-to-Weight
0.33 HP/kg (3.01 kg/HP)
Power Band Window
6,500–8,500 rpm
Standover Height
810 mm (31.9 in)
Engine
Displacement1101.0 ccm (67.18 cubic inches)
Engine TypeIn-line four, four-stroke
Engine DetailsIn-line four, four-stroke
Power95.0 HP (69.3 kW)) @ 8500 RPM
Torque66.0 Nm (6.7 kgf-m or 48.7 ft.lbs) @ 6500 RPM
Compression9.2:1
Bore x Stroke71.5 x 68.6 mm (2.8 x 2.7 inches)
Valves/Cylinder2
Fuel SystemCarburettor
Fuel ControlDouble Overhead Cams/Twin Cam (DOHC)
IgnitionTCI additional vacuum adjusted! / electric kick starter - Witch is separated from the engine, for emergency mounting only
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Power
Compare engine output with similar motorcycles if acceleration, highway use or two-up riding matters.
Torque
Torque is useful for judging real-world pull, especially for touring, commuting and loaded riding.
Seat Height
Check the seat height against your inseam and riding posture before choosing a motorcycle.
Weight
Compare weight carefully because it affects low-speed handling, parking and confidence.
Fuel Capacity
Fuel capacity helps estimate touring range and how often you may need to stop.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
