Sunday, November 20, 2011

Kawasaki Ninja ZX-14R 2012

Engine Updates: More CCs to Please the Power Hungry
Leading off engine updates is a 4.0mm increase in stroke, from 61.0 to 65.0mm, while the 85mm bore remains unchanged. The ZX’s previous 1352cc was a class-leading displacement figure, but with the new 85.0mm x 65.0mm bore and stroke the 14 ensures its place as displacement king with 1441cc. Compression is also up, from 12.0:1 to 12.3:1.

Combustion chamber shapes were optimized for 2012, and they’re now surface-milled now rather than cast. Intake ports are reshaped and polished for improved flow, and new, longer intake valves have better durability, according to Kawasaki.

New camshafts have increased lift and revised profiles, while a stronger cam chain and revised tensioning system have improved reliability. Newly designed forged pistons with thinner crowns are lighter, and like many of the engine components, offer increased durability. The new pistons (paired to stronger connecting rods) are cooled by a new oil-jet cooling system that pumps a continuous stream of lubricant at the underside of each piston. Kawasaki says testing shows the engine runs considerably cooler with this piston cooling system.

Crankshaft main journals are thicker, from 38 to 40mm, and the engine’s dual gear-driven counter balancers have revised balance weights to help mitigate vibes in the longer-stroke engine.
A new air-cleaner element is larger and thicker, with 10% more surface area and 40% more airflow capability, allowing better breathing for the revised fuel injection system. The exhaust system is essentially all-new with reshaped, larger-diameter tapered header pipes, and larger-volume, reshaped mufflers each house a catalyzer.

Manufacturers aren’t always willing to divulge horsepower ratings, and this time is no different, but we can safely speculate crankshaft power above 200 ponies. The previous model claimed 190 hp at the crank with peak torqe at 113.5 ft-lbs at 7500 rpm. The last time dyno tested the 14, the big ZX produced 159.5 hp at 9550 rpm and 99 ft-lbs at 7800 rpm.

Additionally, to cope with the engine’s newfound power, transmission gears have been heat- and surface-treated for improved durability and smoother shifting action.

 Frame and Chassis Updates

Kawasaki says engineers modified more than half of the previous frame’s aluminum castings and forgings, all of which have different flex and rigidity characteristics than the parts they replace. A somewhat more obvious change is a 10mm longer swingarm, largely accounting for a longer wheelbase, up 58.3mm from 57.5mm. Rake and trail figures of 23.0 degrees and 4.7 inches remain unchanged.

The Ninja’s 43mm inverted fork with 13-way compression damping adjustment and 11-way rebound damping, as well as the fully adjustable shock, have revised internal settings and are said to better resist bottoming. Spinning at each end of this super sled are all-new 10-spoke machined aluminum wheels that Kawasaki says are a total of 3.3 pounds lighter than the previous wheel set. Attached to the new wheels are reshaped petal-type brake discs made from a more rigid material. The new discs along with new brake pad material are said to increase feel at the lever.

Despite the useful weight loss in the wheels, the new ZX-14R’s claimed curb weight is now 584 pounds, up from the previous bike’s nearly 567 pounds. This follows an increase in dry weight in 2008 when the ZX-14 gained 11 pounds (a result of the then new exhaust system) from the 2006 model’s dry weight of 474 pounds.

New Bodywork: Subtle but Tougher Looking

Kawasaki has given the svelte-looking-for-its-size ZX subtle but useful updates to the bodywork.
The frontal area of the fairing has a more aggressive nose design and the quad-headlight glass assembly is now reshaped so as to create the look of two separate lights rather than four on the previous 14. The traditional 4-fin theme along the fairing’s sides has a more pronounced 3D design this year, which Kawi says better vents engine heat away from the rider and passenger. Designers also took pains to conceal as much as possible body panel fasteners and hooks.

Faired-in turn signals remain part of the bodywork, as does a pillion cover – standard on all U.S.-spec models – but a newly shaped seat is claimed to offer better support while making it easier for shorter riders to reach the ground. However, the 31.5-inch seat height remains the same.

Colors for the 2012 ZX-14R are Metallic Spark Black, Candy Surf Blue or Golden Blazed Green with special graphics (SE). Pricing is currently set at $14,699, an $1100 increase from 2011.

2 komentar:

No words for this Ninja bikes which is my favorite bike. Just minute ago, i have seen video of Ninja and Hayabusa bike in which ninja Bike rider easily beat Hayabusa bike rider whether the Hayabusa top speed record set in 1999, before the limited top speed of 186 manufacturers, therefore a limited 14 actions are faster because they do not come from the factory this way, the recording can not be broken.

yes same with me, ninja is so stylish and more powerfull,,
i want to try riding new 2012 ZX-14R,

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