Yamaha R6
123 hp, 599 cc, 417 lbs2015 - 2016
Kawasaki Ninja 650R
71 hp, 649 cc, 441 lbs2009 - 2011
EngineYamaha R6Kawasaki Ninja 650R
Displacement599 cc649 cc
Max power123 hp (@14 500 RPM)71 hp (@8 500 RPM)
Max torque47 lb ft (@10 500 RPM)44 lb ft (@7 250 RPM)
Redline16 000 RPM11 000 RPM
Idling speed1 200 RPM1 200 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC Inline-4DOHC Inline-2
Compression13.10:111.30:1
Oil capacity3.22 quart2.18 quart
Oil type10W40, Yamalube 10W40, Shell Rotella 10W4010W40
Spark plug typeNGK CR10EKNGK CR9EIA-9
CoolingLiquidLiquid
Valves168
Bore67.0 mm83.0 mm
Stroke42.5 mm60.0 mm
Throttle bore38.0 mm
Weight to power3.39 lbs/hp6.21 lbs/hp
Power to weight737 hp/2500lbs402 hp/2500lbs
Battery typeYTZ10S12V 10Ah
GearboxYamaha R6Kawasaki Ninja 650R
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain type
Gears count66
Primary ratio2.0732.095
Final drive2.8133.067
1. gear2.583 (78 mph)2.438 (52 mph)
2. gear2.0 (101 mph)1.714 (73 mph)
3. gear1.667 (121 mph)1.333 (94 mph)
4. gear1.444 (140 mph)1.111 (112 mph)
5. gear1.286 (157 mph)0.966 (129 mph)
6. gear1.15 (176 mph)0.852 (147 mph)
ChasisYamaha R6Kawasaki Ninja 650R
Frame typeAluminium DeltaboxTwin-pipe perimiter design, steel
Front susp.USD, dia 41mm, 4.53 in travel41mm fork, 4.72 in travel
Rear susp.4.72 in travelMonoshock, 4.92 in travel
Summary

The Yamaha R6 and Kawasaki Ninja 650R are two of the most popular Japanese sports bikes in the market. While both motorcycles are designed to target the same audience, there are distinct differences in their specifications and features.

The 2015-2016 Yamaha R6 is a sleek and aggressive-looking sports bike with a 599cc engine and a six-speed transmission. It features a quick-shifter, slipper clutch, and adjustable suspension for a smoother ride. The R6 is equipped with a front and rear disc brake system that provides excellent stopping power, even in challenging road conditions. This bike is designed for the more experienced riders who want speed, performance, and agility.

In contrast, the 2009-2011 Kawasaki Ninja 650R is a more versatile bike with a 649cc engine and a six-speed transmission. It is equipped with a comfortable seating position and an adjustable windscreen, making it suitable for long rides. The Ninja 650R also features anti-lock brakes, a digital display, and a fuel-injected engine that delivers excellent fuel efficiency. This bike is targeted towards beginner and intermediate riders who want a bike that is easy to handle but still offers a thrilling riding experience.

When comparing the Yamaha R6 and the Kawasaki Ninja 650R, there are some notable differences. The R6 is faster, more agile, and has more advanced features that appeal to experienced riders. On the other hand, the Ninja 650R is a more practical choice with better fuel economy and comfort, making it more suited for daily commuting and long rides.

Both bikes have their bright spots and flaws. The Yamaha R6 shines in terms of its lightning speed, exceptional handling, and sharp brakes. Its downside is that it can be a bit too aggressive for some riders, and it lacks comfort features for long rides. On the other hand, the Kawasaki Ninja 650R is an excellent choice for beginners and intermediate riders who want to ease into the sports bike scene. However, its downside is that it is not as fast and exciting as the R6, and its style may not appeal to all riders.

In summary, the Yamaha R6 and Kawasaki Ninja 650R are two great sports bikes with their unique characteristics and targeted audiences. It all boils down to the rider's preference and experience level when choosing which bike to buy.