What do we know about the new 2021 Kawasaki ZX-6r?

What do we know about the new 2021 Kawasaki ZX-6r?

Kawasaki introduced the first ZX-6r in 1995. Taking the cues from ZX-9r introduced a year earlier.

With the Kawasaki trademark lime green paint scheme, the first ZX-6r had a massive single horizontal headlight.

There on it went under several iterations.


  • Introduction of G series in 1998 saw power increment from 100 to 108 hp.
  • G series was replaced by J in 2000 again the power goes up to 112 hp from 108 hp.
  • In 2002 Kawasaki opted to increase the displacement from 600 cc to 636 cc by name ZX-6r A1P. However, customers were allowed to choose the limited 599 cc.
  • A year later, Kawasaki introduced the fuel injection meant an increase in rpm and power subsequently. 
  • 2005 Kawasaki again improved the ZX-6r by pushing the power to 113hp. With other notable changes like under-seat exhaust, black aluminium frame and round fairings.
  • In 2007 with the help of Tomomi Manako aligned all the body parts suspension, swingarm, frame as per the expectations for track usage.
  • 2008 saw no significant changes apart from the paint scheme.
  • 2009 Kawasaki changed the look of ZX-6r and made it similar to ZX-10r reducing its weight by 10kgs.

2010 to present

  • 2010 saw improvement in engine and slipper clutch.
  • Kawasaki again re-introduced 636cc in 2013 while they made the 599 as limited edition model.
  • In 2019 Kawasaki brought the Euro-4 compliant ZX-6r plus got 129 horses. It also comes with KQS Quickshifter, amended seat and bodywork.
  • 2020 Kawasaki sold 636cc model whereas in Japan the 599cc model continued.

2021 ZX-6r

There are no changes apart from the paint scheme and graphics. The present model is Euro 4, and it is not for the European market.

For the 2020 model, the front fender is lime green for 2021 it is black. 

Change in decal. There is a change in the under-cowl and tail cowl colours for 2020 they were lime green.

For 2021 they are white and black respectively.

Whether we see a change in paint scheme for other regions is still a doubt.

Release Date and Price 

In Japan August 1, 2020, is the release date and subsequently, there is no change in the price of last years model and this year, which is 1,353,000 yen.

Spec sheet remain as is

Car name (common name) Ninja ZX-6R KRT EDITION Primary reduction ratio/Secondary reduction ratio 1.900(76/40) / 2.866(43/15)
Ninja ZX-6R
Model 2BL-ZX636G Frame format diamond
Overall length x width x height 2,025 mm x 710 mm x 1,100 mm Suspension system Previous Telescopic (Inverted / Inner tube diameter 41mm)
Distance between axes 1,400 mm rear Swing arm (Unitrack)
Minimum ground clearance 130 mm Wheel travel Previous 120 mm
Seat height 830 mm rear 151 mm
Caster/Trail 23.5°/101mm tire size Previous 120/70ZR17M/C (58W)
Engine type/valve system Water-cooled 4-stroke parallel 4-cylinder/DOHC 4-valve rear 180/55ZR17M/C (73W)
Total displacement 636 cm³ Wheel size Previous 17M/C x MT3.50
Inner diameter x stroke/compression ratio 67.0mm×45.1mm/12.9:1 rear 17M/C x MT5.50
Maximum output 93kW(126PS)/13,500rpm Brake type Previous Dual disc 310mm (outer diameter)
Ram air pressure applied: 97kW(132PS)/13,500rpm
Maximum torque 70N・m (7.1kgf・m)/11,000rpm rear Single disc 220mm (outer diameter)
Starting method Self starter Steering angle (left/right) 27° / 27°
Ignition system Battery & coil (transistor ignition) Vehicle weight 197 kg
Lubrication method Wet sump Fuel used Unleaded premium gasoline
Engine oil capacity 3.6L Fuel tank capacity 17L
Fuel supply system Fuel injection Boarding capacity 2 people
Transmission format 6-step return Fuel consumption rate (km/L) *1  
26.0km/L (Ministry of Land, Infrastructure, Transport and Tourism notification value: 60km/h, fixed-area fuel consumption value, when two people are on board) *2
Clutch type Wet multi-plate  
18.3km/L (WMTC mode value class 3-2, with 1 passenger) *3
Gear ratio 1st speed 2.846 (37/13) Minimum turning radius 3.4m
2nd speed 2.200 (33/15) Color manufacturer’s suggested retail price Ninja ZX-6R KRT EDITION
Lime Green x Ebony
1,353,000 yen
(Body price 1,230,000 yen, consumption tax 123,000 yen)
Ninja ZX-6R
3rd speed 1.850 (37/20) Pearl Crystal White x Pearl Storm Gray
4th speed 1.600 (32/20) 1,353,000 yen
5th speed 1.421 (27/19) (body price 1,230,000 yen, consumption tax 123,000 yen)
6th speed 1.300 (26/20)  

Source: Kawasaki

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