The new Kawasaki NINJA® ZX-6RR sportbike marks a dramatic departure from the broad-spectrum appeal of the earlier Ninja sportbikes, giving the bike a much stronger track bias. The limited edition street-legal ZX-6RR boasts aggressive race-worthy features -including engine, chassis, riding position and overall performance upgrades oriented towards serious sport riding, track days or full-on racing. Designed with the expert and professional racer in mind, this new generation motorcycle is destined to dominate Supersport racing around the world.
The heart of the ZX-6RR is a liquid-cooled, DOHC, 16-valve, 599cc, four-cylinder four-stroke engine that delivers increased performance, especially in the high rpm ranges. To make the engine more competitive, new lightweight forged pistons weigh in at five grams lighter, while longer rods and a shorter stroke produce the high revs required for the track. The new plated, all-aluminum cylinders have 5mm shorter skirts for reduced weight. The water passageways have been reshaped for improved cooling performance. The new engine is lighter, more compact, revs higher and makes more power.
Intake and exhaust valves for the compact engine are 10mm shorter, resulting in less weight and improved high-rpm performance. Also improving high-rpm performance and valve control are lighter, oval-shaped intake valve springs. In addition, stepped spring seats better stabilize the valve springs.
To reduce cylinder weight, vibration and engine noise, the outer surface of the cam-chain tunnel has been redesigned. A new crankcase is also lighter and more rigid, allowing oil jets to be positioned closer to the pistons for optimal lubrication. To match the engine's overall compact design, the engine oil pan capacity has also been reduced.
The ZX-6RR is fed by a new-age fuel injection system that utilizes large-bore 38mm throttle bodies, while a 32-bit high-speed microprocessor-controlled timing is ultra-responsive to engine needs. The integrated system helps ensure smooth linear power characteristics and high engine output and with low emissions. A new centrally located ram-air duct system contributes to added performance, improves intake efficiency and saves weight by eliminating a number of parts needed for the prior Ram-air system.
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