Yamaha XS1100 Sport
Yamaha XS1100 Sport | |
Manufacturer | |
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Production | 1981 |
Class | Standard |
Engine | Four stroke transverse four cylinder, DOHC, 2 valves per cylinder. |
Compression ratio | 9.2:1 |
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 |
Transmission | 5 Speed |
Suspension | Front: Telescopic fork. Rear: Dual shocks Swing arm, preload adjustable |
Brakes | Front: 2x 298mm discs Rear: Single 298mm disc |
Front Tire | 3.50-19 |
Rear Tire | 4.50-17 |
Seat Height | 800 mm / 31.5 in |
Weight | 258kg / 568.7 lbs (wet) |
Recommended Oil | Yamalube 10w-40 |
Fuel Capacity | 22 Liters / 5.8 gal |
Manuals | Service Manual |
Engine[edit | edit source]
The engine was a Air cooled cooled Four stroke transverse four cylinder, DOHC, 2 valves per cylinder.. The engine featured a 9.2:1 compression ratio.
Drive[edit | edit source]
Power was moderated via the Wet, multi-disc (8 drive plates, 7 driven plates).
Chassis[edit | edit source]
It came with a 3.50-19 front tire and a 4.50-17 rear tire. Stopping was achieved via 2x 298mm discs in the front and a Single 298mm disc in the rear. The front suspension was a Telescopic fork. while the rear was equipped with a Dual shocks Swing arm, preload adjustable. The XS1100 Sport was fitted with a 22 Liters / 5.8 gal fuel tank.
Photos[edit | edit source]
Overview[edit | edit source]
Yamaha XS 1100 Sport
After the XS1100, the XS1100. (In some circles it is known as 'Sport'; however you call it there is no difficulty in distinguishing it from the early model, for it has an all-black finish and a small fairing, or big cowling, around the headlamp.) Brought into Europe for the 1981 season, this big Yamaha was fundamentally unchanged from the original. The engine still put out 95bhp but handling, claimed the makers, had been improved with new rear-suspension units with four-way damping control, and a leading-axle front fork using air pressure up to 15psi. New too on this latest 'Excess' were what Yamaha called italic-spoke wheels, in which the spokes are curved to promote a 'look fast when standing still' look. After the XS1100 the XS1100 Sport, dis finish, headlamp cowling and air-assisted, 1981 Testers complained that the fairing caused turbulence, resulting in a disturbed ride at over 100mph. It is difficult, of course, to make a 6001b two-wheeler nimble as well as fast; but other makers, with late designs, got further along this path than Yamaha with this basically mid-1970s big four.
Year | 1981 |
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Engine Type | Four stroke transverse four cylinder, DOHC, 2 valves per cylinder. |
Displacement | 1101 cc / 67.2 cu-in |
Bore X Stroke | 71.5 x 68.6 mm |
Cooling System | Air cooled |
Compression | 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 Tire | 3.50-19 |
Rear Tire | 4.50-17 |
Rake | 29º 30 |
Trail | 130 mm / 5.1 in |
Seat Height | 800 mm / 31.5 in |
Wet Weight | 258kg / 568.7 lbs |
Fuel Capacity | 22 Liters / 5.8 gal |