Honda VFR1200FA

Features

New V4 engine

the VFR1200F adopts an ingenious solution in order to centralise mass and at the same time achieve a compact, space-saving solution. The rear cylinders are placed side by side but close together, while the front cylinders are more widely spaced. This layout allows for a slim, compact waist' that fits comfortably between the rider's legs. It also supports mass centralisation, thus contributing to the bike's balanced feel and ease of control. With no right-left couple imbalance, the need for a balancer is eliminated and friction is reduced. A new Phase-shift Crankshaft complements the advantages of the cylinder layout. Operating with a 28° throw, it effectively reduces primary vibration and noise, eliminating the need for a power-sapping balance shaft. The new V4 typically produces more than 90% of its maximum torque (129Nm/8,750 rpm) at 4,000rpm. To allow the rider to comfortably take full advantage of this torque, delivery is smoothed by four drivetrain dampers, which further eliminate uncomfortable vibration and backlash. The VFR1200F utilises the UNICAM single overhead camshaft cylinder head design from the world-class CRF motocrossers. The logic was straightforward: in an environment where space, performance and weight are at a premium, this technology was perfect for a project where mass centralisation and ergonomics were prime design criteria. Also borrowed from the CRF range and the RC211V is the sealed crankcase system that reduces the pumping loss created through piston movement, and air density.

Slipper clutch

To aid control under intense deceleration a slipper clutch is fitted, similar to the system on the CBR1000RR Fireblade. Even under the most excessive downshifting the clutch is designed to slip, thus preventing the rear wheel from inadvertently locking up, allowing the rider to stay firmly in control.

Shaft Drive

The highly developed shaft drive system features an offset propeller shaft and a pivot that expands vertically as well as a sliding constant velocity joint that takes up any variations in length during the rear wheel's arc of travel. At the output shaft a clutch damper absorbs backlash effectively. Thanks to the rigidity of the pivot, stability is improved and throttle-to-drive delivery is much more direct.

Layered Fairing.

The patented layered fairing design of the VFR1200F is a perfect match of form and function. Designers and engineers worked together to create a uniquely beautiful shape and, at the same time, optimal air flow and heat management. The fairing design incorporates two layers, which harnesses the benefits of flowing air to the machine's dynamic and mechanical advantage. This has two functions; air entering between the layers and through two oval-shaped spaces in the front of the fairing is channelled in exactly the directions needed to enhance the bike's stability at higher speeds. By effectively increasing the speed of the air by channelling it through smaller apertures before it reaches the radiators, engine cooling is optimised and the hot, exhausted air is channelled away from the rider and passenger for a cooler, more comfortable ride. The heat generated by the powerful, enclosed V4 engine is also channelled away to keep hot air away from the rider.