Manufacturer | Yamaha Motor Company |
---|---|
Also called | Star Roadliner (US) Star Stratoliner (US touring version) Yamaha Midnight Star (UK) |
Production | from 2006 to 2017 |
Class | Cruiser |
Engine | 1,854 cc (113.1 cu in)48 degree 4-stroke air-cooled V-twin |
Bore / stroke | 100mm x 118mm (3.937 in x 4.646 in) |
Compression ratio | 9.5:1 |
Power | 101 hp (75 kW) @ 4,400 rpm (rear wheel) [1] |
Torque | 123 lb⋅ft (167 N⋅m) @ 2250 rpm (rear wheel) [1] |
Transmission | 5-speed gearbox to belt drive |
Frame type | Aluminium double cradle |
Suspension | Telescopic forks front, rear swingarm (Link-type monocross suspension) |
Brakes | 298 mm (11.7 in) double disc front, single rear |
Wheelbase | 1,715 mm (67.5 in) |
Dimensions | L: 2,580 mm (102 in) W: 1,100 mm (43 in) H: 1,125 mm (44.3 in) |
Seat height | 705 mm (27.8 in) |
Weight | 329 kg (725 lb) [2] (dry) |
Fuel capacity | 17 litres (3.7 imp gal; 4.5 US gal) [2] |
The Yamaha XV1900A is a motorcycle manufactured by the Yamaha Motor Company and sold in the United States through Yamaha's Star Motorcycles division. It was the largest Yamaha motorcycle while in production. [3]
The Yamaha XV1900A cruiser was developed to exploit the large displacement end of the market for large cruisers. Yamaha had a well established range of big "Star" cruisers which went up to the Wild Star 1600 cc but there was a need to redesign the engine to meet anticipated exhaust emissions regulations and the opportunity to update the styling, which had remained largely unchanged for a decade. [3]
The 1,854 cc (113.1 cubic inches) four-stroke, air-cooled, 48 degree V-twin engine was purpose-built to deliver maximum torque at 2,500 rpm in the 55 to 75 mph (90 to 120 km/h) range used for motorcycle cruising. Each cylinder has four pushrod-activated valves and twin spark plugs. [4] To reduce friction, the forged pistons have an Alumite coating and travel in ceramic-composite-coated cylinder bores. [3]
With an undersquare bore and stroke of 100mm (3.937 in) x 118mm (4.646 in), the engine has a compression ratio of 9.5:1 and is the first Yamaha cruiser motorcycle to be equipped with the compact Exhaust Ultimate Power Valve (EXUP) four-stroke power valve system previously only found on their line of high performance sports motorcycles. [3]
An unusual feature of the new engine is a special 'Pent-roof combustion chamber', designed to increase the efficiency of gas flow. The engine also has counter-rotating balancers on both ends of the crankshaft to reduce the vibration typical of large V-Twins. [5]
The engine’s output is transmitted via a wide-ratio five-speed gearbox and compact new transfer case, with power delivery controlled by a hydraulic clutch, the XV1900A Midnight Star is equipped with a belt drive system. [3]
A lightweight long wheelbase (1,715 mm or 67.5 in) frame was designed using aluminum die casting to minimize weight, with a double cradle design to provide the strength. Suspension consists of a die cast aluminum swinging arm and a hidden single horizontal rear shock absorber and large diameter front forks. [3]
Starting in 2008, a custom version was produced in limited numbers featuring a lowered seat, lengthened front forks, a wider 210 mm rear tyre, the widest on any Yamaha motorcycle, [6] and special black finish to the engine and a range of custom fittings. [4] The Raider was discontinued for 2018.
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