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 introduced in 2002 , and a smaller 1300 cc version was introduced in 2003. At the time this bike was introduced the Honda VTX 1800 engine was the largest displacement production V-Twin engine in the world, with the largest pistons ever produced for a car or a motorcycle. This title didn't last long however as the displacement race still continues today. There are several differently styled models available for each displacement class.
The VTX series has a muscular looking body, it is quite long and low to the ground featuring significant rake and trail. The 1800 puts out 120 ft-lbs of torque at only 3500 rpm and 106 bhp @ 5000 rpm, making the VTX series one of the more powerful production V-twin motorcycles of its time. 
On the VTX 1800, Honda updated its linked braking feature, instead of having the usual separate hand and foot brakes, the hand brake operates two-thirds of the front pistons while the foot operates the other third in front and all the rear via a proportioning valve. The throttle is updated with Honda's new Programmed Fuel Injection (PGM-FI) system, using a vacuum sensor within the first ten percent of opening to more precisely meter torque, until the standard throttle position sensor takes over.
Power is transmitted to the rear wheel via a shaft drive.
The VTX 1300 uses standard unlinked brakes, with a single large front disk. The 1300 also uses a carburetor unlike the fuel injected 1800, and therefore is much simpler in terms of design. Although the engine is similar to the 1800, it is not just a smaller bore/stroke but a different design.
The VTX 1300 features a four stroke, two cylinder, liquid cooled V-twin engine. Its compression ratio is 9.2:1. It has a manual 5 speed transmission and, like the 1800, it is a shaft drive.