More power, more torque

The DOHC liquid-cooled parallel-twin engine uses a square bore & stroke of 67 mm x 66.8 mm for an optimum combination of strong low-end torque and excellent top-end power and performance.

Slipper clutch

Not only does the slipper clutch help to prevent rear-wheel lockup on downshifts, it also reduces effort at the lever by almost half, helping to reduce rider fatigue particularly in city traffic or on long rides.

Exhaust system

The exhaust system features dual exit pipe resulting in improved exhaust flow, extra power and a sportier-sounding edge to the exhaust note.

Smooth and compact

Crisp throttle response

PGM-FI electronic fuel injection keeps the engine running efficiently in all conditions and ensures crisp throttle response.

Small & light water pump

Careful flow analysis of the cooling system resulted in a water pump that’s small and lightweight, yet still more than capable of keeping the engine running its best at high output levels.

Maximized efficiency

In order to maximize air-intake and exhaust efficiency, the profile from the air cleaner through the intake ports to the exhaust pipe was made as straight as possible, helped in part by repositioning the battery away from the rear of the airbox intake duct.

Reduced weight & friction

The four valves in each of the DOHC cylinder heads have narrow stems, thereby reducing weight and friction and increasing efficiency.

High-tech design

A light and compact roller-rocker-arm assembly and shim-type valve adjustment allows a lower valve-spring load for reduced friction and a compact cylinder head.

Durability

The pins in the silent cam chain have been treated with vanadium, which both reduces friction and improves durability. The lightweight pistons use the same advanced manufacturing process as those found in the CBR1000RR. To ensure precise cylinder shape, the engine uses the same centrifugal-cast thin-wall sleeves as found in the CBR1000RR.

Reduced friction

The oil pump’s internal relief structure uses the same design as found in the CBR1000RR, which reduces friction, improves aeration performance and simplifies the shape of the oil pan.

Easy shifting

The gear indicator and adjustable shift-up indicator make it even easier to use the smooth-shifting six-speed gearbox.