Ups
- Pure superbike with easy-to-ride character
- Updates galore that improve the overall package
- Electronics and comforts that improve the ride
Downs
- Revised, more aggressive ergonomics could reduce comfort, especially to smaller riders
Verdict
Following six consecutive years of World Superbike domination under the trusted hands of Jonathan Rea, Kawasaki updates the 2021 Ninja ZX-10R and up-spec Ninja ZX-10RR with form and functional revisions that riders of all levels can enjoy.
Overview
The Kawaski Ninja ZX-10R is a production superbike with sights set on storming apexes and blasting down straightaways in search for the ideal lap time. In fact, Cycle World’s own Road Test Editor Michael Gilbert currently competes in the MotoAmerica superbike championship aboard the ZX-10R. Integrated aerodynamic winglets, a ripping inline-four engine with a claimed 203 hp, and sharp handling signal this motorcycle’s intent.
Updates for 2021
Kawasaki made loads of changes to the 2021 ZX-10R. Mechanical changes to the 998cc inline-four powerplant are minimal, but the Ninja does adopt a new air-cooled oil-cooler. A new exhaust system is used to maintain power output while improving emissions. Internal gear ratios of the cassette-style six-speed transmission have been revised for quicker acceleration, while the final drive (a larger 41-tooth versus a 39-tooth) sprocket is used.
Several updates to the electronic rider-aid suite were introduced, including the use of a full ride-by-wire system (eliminating the need for traditional throttle cables). New integrated riding modes are accessible via a 4.3-inch TFT display, which now has smartphone connectivity. Cruise control has also been added.
With an emphasis on balanced handling, Kawasaki lowered the swingarm pivot, lengthened the wheelbase, optimized front-end geometry, and dialed in the Showa suspension settings further. The ZX-10R’s riding position has also been made more aggressive, with the clip-on style handlebars pushed forward 10mm and the footpegs raised by 5mm.
Finally, the ZX-10R receives a new-generation Ninja styling. This includes the addition of integrated aerodynamic winglets, a taller windscreen with more protection, and a new ram-air intake design for a more aerodynamically efficient motorcycle.
Pricing and Variants
Pricing ranges depending on color, ABS, and/or trim. Prices are as follows: $16,399 for the ZX-10R; $16, 699 KRT Edition; $17,399 ZX-10R ABS; $17,699 KRT Edition ABS; and $28,999 ZX-10RR.
The up-spec ZX-10RR is available in limited numbers for $28,999. Being the homologation-special model from Kawasaki, the ZX-10RR sees several performance-minded variations, including lightweight Pankl pistons, titanium connecting rods, new intake and exhaust valve springs, and Pirelli Diablo Supercorsa SP tires riding on model-specific Marchesini forged wheels.
Competition
Sportbikes that serve as the ZX-10R’s competition include the Aprilia RSV4, BMW S 1000 RR, Ducati Panigale V4, Honda CBR1000RR-R Fireblade SP, Suzuki GSX-R1000, and Yamaha YZF-R1.
Powertrain: Engine, Transmission, and Performance
The heart of the ZX-10R is the 998cc liquid-cooled inline-four engine that is mated with a six-speed transmission. With a manufacturer-claimed peak 203 peak horsepower and 84 pound-feet of torque, the ZX-10R is no slouch, as contributing author Chris Northover wrote in his first ride review. The engineering team’s work in maintaining horsepower figures while meeting emissions regulations came down to a longer silencer, revised collector arrangement, repositioned catalytic converter, and more efficient cooling. Revised gear ratios have also helped improve its performance.
Handling
The make-up of the ZX-10R’s chassis includes a twin-spar, cast aluminum frame, a Showa Balance Free Fork, and Showa BFRC-Lite (Balance Free Rear Cushion) shock. Even with loads of changes, this Kawasaki maintains its easy-to-ride character. “The feedback and feel from the front end of this new bike was spot on,” Northover wrote, “giving riders the confidence to push hard into turns and carry speed through the bumpy, scarred corners of the airfield track we were testing on. Even on a damp/drying track, the ability to pull the bike onto a line and thread the needle between the wet bits was impressive. In fact, that just set the tone for this bike; it’s confidence-inspiring all around.”
Brakes
New rear brake pads and repositioning of the rear brake master cylinder are changes seen for 2021. The ZX-10R features race-spec Brembo four-piston calipers with dual 330mm discs up front and single 220mm disc out back. Stainless steel braided brake lines contribute to direct feel. Kawasaki’s ABS is available as an option. In his report, Northover commented: “While braking in a straight line KIBS is very effective and only cuts in when the rear wheel kicks up off bigger bumps. Best of all, when it does cut in, it doesn’t give you an immediate heart attack in fear of not making your turn. You can feel its intervention, but the lever doesn’t go completely numb.”
Fuel Economy and Real-World MPG
Miles-per-gallon figures were not provided for this model. Tank capacity is listed at 4.5 gallons.
Ergonomics: Comfort and Utility
There is no doubt about it, the ergonomics are circuit-focused with clip-ons that are now positioned 10mm farther forward and at a straighter angle. The seat is higher as are the pegs, so the rider is situated in a more aggressive riding posture, which, Northover related, “might reduce comfort but also gives more support under acceleration, giving your arms an easier time, and you won’t need to replace a set of toe sliders after every single trackday.” The revised windscreen makes it easier to tuck under the aerodynamic bubble.
Electronics
The ZX-10R is fitted with electronics such as Kawasaki Intelligent Anti-Lock Braking System (aka cornering ABS), four selectable ride modes, five-mode traction control, launch control, and electronic steering damper, and creature comforts such as electronic cruise control and a TFT dash with smartphone connectivity.
Warranty and Maintenance Coverage
A 12-month warranty is included, however, 12, 24, 36, or 48-month options are available with Kawasaki’s Protection Plus.
Quality
Overall, the ZX-10R sees updates that help it maintain its pure sportbike form and aid in improved lap times.
2021 Kawasaki Ninja ZX-10R Claimed Specifications
| MSRP: | $16,399–$17,699 |
| Engine: | 998cc, DOHC, liquid-cooled, 4-stroke inline-4; 16 valves |
| Bore x Stroke: | 76.0 x 55.0mm |
| Transmission/Final Drive: | 6-speed/chain |
| Fuel Delivery: | DFI, 47mm Mikuni throttle bodies w/ dual injectors |
| Clutch: | Wet, multiplate slipper clutch; cable actuated |
| Engine Management/Ignition: | TCBI w/ digital advance |
| Frame: | Twin spar, cast aluminum |
| Front Suspension: | 43mm inverted Balance Free Fork, stepless rebound and compression damping, spring preload adjustable; 4.7 in. travel |
| Rear Suspension: | Balance Free gas-charged shock, adjustable stepless, dual-range (low-/high-speed) compression damping, stepless rebound damping, fully adjustable spring preload; 4.5 in. travel |
| Front Brake: | Brembo radial-mounted Monoblock 4-piston calipers, dual semi-floating 330mm discs (w/ ABS) |
| Rear Brake: | Aluminum 1-piston caliper, 220mm disc (w/ ABS) |
| Wheels, Front/Rear: | Cast aluminum |
| Tires, Front/Rear: | 120/70ZR-17 / 190/55ZR-17 |
| Rake/Trail: | 25.0º/4.1 in. (105mm) |
| Wheelbase: | 57.1 in. (1,450mm) |
| Ground Clearance: | 5.3 in. (135mm) |
| Seat Height: | 32.9 in. (835mm) |
| Fuel Capacity: | 4.5 gal. (17L) |
| Wet Weight: | 456 lb. (207kg) |
| Contact: | kawasaki.com |
Source: MotorCyclistOnline.com