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General Specifications​

  • Engine type: 1,101cc DOHC 8-valve air-cooled transverse four-cylinder

  • Bore and Stroke: 71.5mm x 68.8mm

  • Compression Ratio: 9.2:1

  • Carburettors: Four 34mm CV Mikunis

  • Ignition: Electronic (with mechanical and vacuum advance)

  • Transmission: 5-speed constant mesh, Hy-Vo primary drive, shaft final drive

  • Wheelbase: 1550mm / 61 in

  • Rake / Trail: 29° castor angle

  • Seat Height: 78.7cm / 31 in

  • Ground Clearance: 15.2cm / 6 in

  • Fuel Capacity: 12.5 litres / 3.3 gallons (5.3-gallon / 20-litre standard tank interchangeable)

  • Tyres: Front – 3.5 x 19in Bridgestone; Rear – 4.5 x 17in Bridgestone

  • Wet Weight: 270kg / 594 lb

  • Colours:

    • Main bodywork: Gloss Black with dark gold badging and accents

    • Engine, Exhausts & Frame: Black

    • Wheels & Brake Discs: Cast Alloy with gold highlighting

  • Claimed power: 95bhp @ 8,500rpm

  • Claimed torque: 66.5 lb/ft @ 4,000rpm

  • Standing ¼ mile: 12.3 seconds

  • Top speed: 136.5 mph / 219.7 km/h

  • Standard Equipment: Handlebar-mounted flyscreen fairing, 3-position adjustable handlebars, twin slotted front disc brakes, air-assisted front forks, 4-way rebound adjustable rear shocks, dual helmet locks, dual steering locks, frame padlock/chain storage compartment, low fuel warning lamp, self-cancelling indicators

  • Optional Equipment: 5.3-gallon (20L) large capacity fuel tank

  • Original List Price fro 1981: $3,500 AUD, £2,600 GBP

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*Market Specific Notes

  • The 1981 Yamaha XS1100 model family was badged and designated differently across global markets depending on regional performance specs and factory styling packages:

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UK / European & Australian Markets (XS1100RH / XS1100 Sport)

  • Officially designated as the XS1100RH (and marketed as the XS1100 Sport or "Bête Noire" in Europe).

  • High-performance specification featuring enlarged 36mm intake valves, a 29° castor angle, air-assisted front forks, and 4-way rebound adjustable rear shocks.

  • Full factory sport styling with a small flyscreen fairing, 3.3-gallon (12.5L) tank, clip-on style adjustable handlebars, trapezoidal rear-view mirrors, and an all-black finish with subtle gold accents on the wheels and brake discs.

  • Official Yamaha factory model prefix: 5N5.

 

North American Market (XS1100H / XS1100SH / XS1100LH)

  • Rather than offering the European/Oceania sport specification in North America, Yamaha Motor Corporation (USA and Canada) structured their 1981 lineups around touring and cruiser configurations:

  • XS1100H: The standard 1981 roadster featuring the larger 5.3-gallon fuel tank and standard touring ergonomics (4R1 US / 4T1 Canada).

  • XS1100SH (Special): The standard factory-custom cruiser with pullback bars, stepped seat, and teardrop tank (4R0 US / 4T0 Canada).

  • XS1100LH (Midnight Special): The flagship cruiser variant featuring blacked-out chrome, gold-plated trim, black engine cases, and a 16-inch rear wheel (4W1 US / 4W2 Canada).

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​Note: The sport-faired XS1100RH (5N5) was not part of the official North American catalog; units existing in North America today are private grey-market imports from Oceania or European regions.

 

References & Historical Sources

Specifications: Text

Specifications

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