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The Honda VTX series is a line of Honda V-twin cruiser motorcycles inspired by the Zodia concept shown at the 1995 Tokyo Motor Show. The Honda VTX 1800 was launched in 2001 as a 2002 model.〔〔 At the time this bike was introduced the Honda VTX engine was the largest displacement production V-twin in the world, but that distinction would be short-lived as the VTX1800 was superseded in 2004 by the 2-liter Kawasaki Vulcan 2000., but the VTX 1800 still produced better 0-60 mph and 1/4 mile times. ''VTX'' stands for V-Twin Extreme.〔 A smaller VTX1300 line was introduced for the 2003 model year, which evolved into the VT1300C line starting with the 2010 model year.〔〔 In addition to the 52° V-twin layout, commonalities for the 1800 and 1300 powertrains include:〔〔 *radiator with cooling fan; *cylinder heads with two intake valves and a single, larger, exhaust valve; *rocker arms with screw-and-locknut clearance adjusters; *electronic control unit with 3-D ignition maps for each cylinder; *two spark plugs per cylinder; *dry sump oil system with the oil tank inside the gearbox case; *shaft final-drive. == VTX1800 == Making amends for years of underperforming V-twins, Honda set out to produce a cruiser with the biggest CID ever and so designed a big bike with a muscular looking body that was long and low to the ground, featuring significant rake and trail.〔 Honda claimed that the 1800 put out of torque at only 3000 rpm and at 5000 rpm, making the VTX1800 one of the most powerful production V-twin motorcycles of its time.〔〔 (See infobox for measured horsepower and torque values.) On the VTX1800, Honda updated its linked braking feature, instead of having the usual separate hand and foot brakes, the hand brake operated two-thirds of the front pistons while the foot operated the other third in front and all the rear via a proportioning valve.〔 The induction system was Honda's programmed Fuel Injection (PGM-FI) system using a Manifold Air Pressure (MAP) sensor in the small throttle areas until the standard throttle position sensor (Alpha N) took over at greater throttle opening values.〔 The VTX1800 also had an emission control system that utilized air injection and catalytic converter controlled by the ECU to reduce hydrocarbons, carbon monoxide, and oxides of nitrogen to levels surpassing emissions standards.〔 The 52-degree V-twin included an offset-dual-pin crankshaft, a design first used on the 1983 Honda Shadow to produce perfect primary balance, as well as two primary-shaft-mounted counterbalancer weights to reduce the inevitable rocking couple vibration in a large V-twin engine.〔 There were three 2002 models, the initial VTX1800C ''Classic'' and then two ''Retro'' models, the VTX1800R with cast wheels plus the VTX1800S with spoke wheels (and tube-type tires). When the VTX1800C was introduced in 2001, it was known as the VTX1800, or more often simply called the VTX.〔 Honda of Japan announced the immediate importation of the American-manufactured VTX1800 cruiser model for their domestic market.〔 Compared to the ''Retro'' models (and the others that would follow) the VTX1800 type C was identifiable by its two-into-one exhaust system, and its speedometer mounted within the handlebar risers.〔 All the other models had staggered dual exhausts and a tank-mounted speedometer, as well as a larger radiator.〔 Honda's sales of the VTX1800 by late 2003 were approaching 30,000 units.〔 A new model was introduced in late 2003 for the 2004 model year; the VTX1800N took its ''Neo-Retro'' style cues from the limited edition Valkrie Rune.〔 Honda added a more performance-oriented VTX1800F model in 2005, which had low-profile radial tires on cast alloy wheels with a five twin-spoke design, and also incorporated an LCD tachometer and clock into the tank-mounted speedometer.〔 As one of the motorcycles that helped to define the ''Performance Crusier'' market, the VTX1800F faced competition from the Yamaha Warrior, Victory Hammer, Kawasaki Mean Streak, and the Harley-Davidson Street Rod.〔 A VTX1800T ''Tourer'' model equipped with saddlebags holding each, a windshield and a passenger backrest, was included in the 2007 line-up.〔 2008 was the final year for Honda's jumbo twin, available in three models: VTX1800N; VTX1800S; and VTX1800T.〔〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Honda VTX Series」の詳細全文を読む スポンサード リンク
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