[1] The vehicles also featured a number of other high end features, some for the first time on Honda ATV, including radial tires, a center hydraulic disc brake system mounted on the rear output shaft, and a fully independent rear suspension system.
Available beginning in 2004 Honda added the GPScape model officially known as the TRX650GPS as an option which adds a built-in GPS unit contained within the instrument cluster assembly.
The GPS featured storage for up to 100 waypoints, digital compass function indicating travel direction and an automatic compensating clock.
Along with the larger engine, Electronic Programmed Fuel Injection (PGM-FI) was introduced.
New features included a rollover sensor to kill the engine in the event the vehicle is partially or fully overturned, front disc brakes, fuel injection, increased power output, improved fuel mileage, elimination of the manual choke and much-easier cold starting, automatic compensation at different altitudes, automatic temperature compensation, a shorter engine warm-up period, and smoother idle.