CB500F

The eight-valve, liquid-cooled, parallel-twin-cylinder engine offers a well-proportioned balance of physical size and willing, enjoyable power output, with an energetic, high-revving character and capable top-end performance.

Already strong off the bottom, this year development focused on faster acceleration through a boost in low-to-mid-range power and torque in the 3,000 to 7,000rpm range.

Feeding the PGM-FI fuel injection is now a straight shot of airflow through the airbox and throttle bodies.

The battery has been repositioned further away from the rear of the airbox intake duct to allow greater airflow.

The exhaust muffler now features dual exit pipes, adding a sportier-sounding edge to each pulse. Peak power arrives at 8,500 rpm, with maximum torque delivered at 7,000 rpm.

The primary couple-balancer sits behind the cylinders, close to the bike's centre of gravity. The primary and balancer gears use scissor gears, reducing noise.

The crank counterweight is specifically shaped for couple-balance is light to allow the engine to spin freely, with reduced inertia.

A six-speed gearbox mirrors that of the RR and uses the same gear-change arm structure and link mechanism.

An assist/slipper clutch enables lighter upshifts and smoother downshifts.

The engine complements the frame's rigidity with four frame hangers on the cylinder head.

Internally, the cylinder head uses roller-rocker arms; shim-type valve adjustment allows them to be light, for lower valve-spring load and reduced friction.

A silent cam chain has the surface of its pins treated with Vanadium, reducing friction with increased protection against wear.

The unchanged 35mm steel diamond-tube mainframe is light and strong, with a tuned degree of yield that gives optimum feedback to the rider as road surfaces change.

Vibration is minimised by the shape and position of the engine mounts, plus the frame's rigidity balance.

The geometry gives nimble, yet confidence-inspiring steering.

Mass centralisation, with the engine in close proximity to the swing-arm pivot point, delivers turning agility, while optimum front/rear weight distribution ensures stability.

The low seat height makes the CB500F very easy to manage and its neutral riding position comfortably accommodates riders of varying heights.

The 41mm preload-adjustable telescopic fork delivers a compliant yet controlled ride and gives great feel for front-tire grip.

A new single-tube rear shock (as found on larger-capacity sport bikes) replaces the double-tube design of the previous model; its large-diameter piston ensures excellent suspension response and temperature management. It has nine-stage spring preload adjustment and works through a rigid box-section steel swing-arm, which now features pressed-steel chain-adjustment end-pieces.

Lightweight, 17-inch cast-aluminium wheels employ hollow cross-section Y-shaped spokes. A single front 320mm petal-style disc and two-piston brake calliper is matched to a 240mm rear disc and single-piston calliper.

ABS is standard.

The CB500Fs naked form has evolved front to rear and exudes a newfound aggression.

Led by the penetrating headlight design, the machine's stance is low-set and ready for action; the side shrouds interlock with the fuel tank and fully emphasise the engine, while the side covers and seat unit continue the theme of muscular angularity.

New LCD instruments feature Gear Position and Shift Up indicators; this is set to a default 8,750 rpm but can be adjusted in 250 rpm increments between 5,000 and 8,750 rpm.