The Honda VTX series is a line of V-twin Honda cruiser motorcycles inspired by the Zodia concept shown at the 1995 Tokyo Motor Show. The Honda VTX 1800 was launched in 1999 as a 2000 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the largest displacement production V-twin in the world, but that distinction would be short-lived as the VTX1800 was superseded in 2004 by the 2.0-liter Kawasaki Vulcan 2000. Nevertheless, the VTX 1800 still produced better 0-60 mph and 1/4 mile times. VTX stands for V-Twin Extreme. The 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 3,000 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,