Engine/Drivetrain

• Powerful four-stroke 249cc liquid-cooled four-valve Unicam® engine (see Technology Section).
• Lightweight titanium intake valves permit the use of smaller valve springs and reduce overall engine height.
• ACG cover, clutch cover and cylinder-head cover are made of magnesium to reduce engine weight.
• Forged 13.1:1 compression, slipper piston and rings are lighter than a conventional design, revving quickly while maintaining excellent cylinder sealing and high-rpm power.
• Lightweight, compact, internal, auto decompression system and handlebar-mounted hot-start system provide superb operation, hot or cold.
• Lightweight Nikasil cylinder lining provides cooler and quieter operation for extended engine life.
• 40mm Keihin FCR carburettor features four rollers on the flat slide, resulting in light throttle effort, smooth operation, crisp throttle response and excellent rideability.
• Carburettor features a throttle position sensor (TPS) that helps maintain a linear throttle response throughout the range and new jetting for smoother power response.
• Twin-sump lubrication system separates the oil supply for the crankshaft, piston and valve train from the clutch and transmission. This ensures a cool supply of oil to the clutch, eliminates clutch and transmission material contamination of the engine oil, and reduces the amount of circulating oil, which permits the use of a smaller oil pump.
• Dual-muffler exhaust system centralizes mass and reduces turning inertia to improve the lightweight feel of the bike.
• Dual-muffler exhaust system also increases low-rpm torque.
• Exhaust system uses a lightweight stainless header and repackable aluminium mufflers.
• Gear-driven balancer reduces vibration and drives the water pump.
• Rugged eight-disc clutch and carefully matched clutch springs for light feel at the lever.
• Durable five-speed close-ratio transmission.

Chassis/Suspension

• Fourth-generation twin-spar aluminium frame is derived from Honda’s CR® series. Forged-aluminium steering head and tapered downtube section are designed to optimise frame rigidity. In addition, tall swingarm pivot plates and thin frame spars create a narrow overall frame cross-section for superb rider comfort and maneuverability.
• HPSD features a compact damper attached to the lower triple clamp and the steering head to allow more aggressive steering characteristics and assist straight-line handling. Damping action smoothly progresses as handlebar deflection increases, which produces very natural steering characteristics and feel.
• Front and rear wheels feature HRC works-type lightweight aluminium spoke nipples.
  Front wheel features large-diameter front axle and wide wheel-bearing span for excellent rigidity.
• Large 25mm rear axle diameter and large-diameter bearings provide significant rigidity to withstand torturous track conditions.
• Revised, sophisticated Inverted Twin-Chamber Cartridge Fork (see Technology Section).
• Pro-Link® Rear Suspension with new damper settings (see Technology Section).
• Large 50mm rear shock damper piston diameter for consistent performance under demanding riding conditions.
• Link-type front brake master cylinder and a lightweight brake rotor provide strong braking.
• Compact twin-piston front brake calliper, anodized-aluminium brake pistons and lightweight front brake disc minimize unsprung weight for improved turning and handling.
• HRC works-type rear brake system integrates the rear master-cylinder and fluid reservoir, eliminating the separate reservoir and hose.
• Large works-style 240mm front and rear brake discs.

Additional Features

• Frame design allows airbox sidecovers to have larger intake ducts, contributing to significant airflow in the mid- and upper-rpm ranges.
• Rider ergonomics are optimized by adapting the handlebar, seat and footpeg height to place the rider's legs at the narrowest frame width for improved comfort and handling.
• Dunlop 742FA front and 756 rear tires for improved traction and cornering.
  Front disc brake cover helps protect rotor and calliper from damage.
• Removable rear subframe allows easy maintenance.
• Washable, two-stage foam air filter for optimal engine protection and easy maintenance.
• Comfortable, durable controls and high-quality fasteners.
• Stainless steel clutch cable for long life.
• Honda Racing™-inspired colours and graphics.
• Cleated rear brake pedal and folding shift lever are made of lightweight aluminium and are designed to complement the riding position.
• Brake pedal features optimized ratio to match integrated rear-brake master-cylinder design.
• Wide, cleated, stainless steel footpegs are self-cleaning, resist corrosion, provide excellent grip and fold for extra ground clearance.
• Aluminium Renthal handlebar (971 bend) is rubber-mounted to help reduce rider fatigue and improve comfort.

Specifications