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Kawasaki ZX-12R: Bike Most Wanted
The liquid-cooled, 1199 cm3 DOHC, 16-valve 4-cylinder engine produces more horsepower than any other machine in its category. New crankshaft has larger flywheels and approximately 20% more inertia for smoother off-idle acceleration and an improved power feel during highway cruising. The direct valve actuation with crowned lifters to equalise pressure across the cam lobes and reduce tear and wear. Narrow valve angles (IN=12", EX=13") are the same as those on the 6R and 9R and ensure a highly efficient combustion chamber shape. The machine produces a maximum power of 131 kW (178 PS)/ 10,500 rpm. With Ram Air 140 kW {190 PS}/ 10,500 rpm the maximum torque is 134 N·m (13.7 kgf·m)/ 7,500 rpm.
A Revolutionary all-aluminum monocoque frame which was inspired by the monocoque frame used on Kawasaki"s KR500 works racer, is used in the bike. Huge box section and cast steering head/swingarm pivot areas realise an extremely stiff structure and contribute to the ZX-12R"s superb high-speed stability and super-sport handling performance. By eliminating the dual large-section beams of conventional aluminium frames, this frame design makes possible a much narrower and more compact overall package and greatly improves aerodynamics.
Now coming to the suspensions, the inverted 43 mm cartridge front fork is fully adjustable for pre-load and compression/rebound damping. Nitrogen gas-charged shock with piggy-back reservoir is 5 mm shorter and uses a softer spring. Step-less spring pre-load and new step-less compression/rebound damping adjustment make it easy to adjust. Front fork rake increased from 23.5" to 25" and fork offset reduced from 32 mm to 28 mm for sportier handling characteristics and improved steering feedback. Longer topping springs and stiffer initial damping reduce nose dive during abrupt throttle closing and helps stabilise chassis during on/off throttle work.
Front semi-floating 320 mm x 5 mm discs deliver superlative braking performance. Opposed six-piston Tokico front brake calipers offer powerful braking performance and precise feel at the lever. Differential bore sizes contribute to superior performance: 27 mm x 2 & 24 mm x 1. All new cast alloy wheels use hexagonal spokes. 17-inch radial tyres are used for excellent traction. The aerodynamics and body work make the bike look cool and sexy. Wind-tunnel designed fairing was developed with help from Kawasaki"s aircraft division. Aerodynamic single-seat cowl contributes to high-speed aerodynamics and is supplied as standard equipment.
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