Yamaha R6
121 hp, 600 cc, 182 kg2003 - 2004
Kawasaki Ninja 400
49 hp, 399 cc, 166 kg2018 - 2020
MetricUS
EngineYamaha R6Kawasaki Ninja 400
Displacement600 cc399 cc
Max power121 hp (@13 000 RPM)49 hp (@10 000 RPM)
Max torque60 Nm (@12 000 RPM)38 Nm (@8 000 RPM)
Redline15 500 RPM9 500 RPM
Idling speed1 200 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC Inline-4DOHC Inline-2
Compression12.40:111.60:1
Oil capacity3.40 litre
Oil type10W40, Motul 300V 10W40, Shell Rotella 10W40
Spark plug typeNGK CR9EK, NGK CR10EK
CoolingLiquidLiquid
Valves168
Bore65.5 mm70.0 mm
Stroke44.5 mm51.8 mm
Throttle bore38.0 mm32.0 mm
Weight to power1.50 kg/hp3.39 kg/hp
Power to weight664 hp/Ton295 hp/Ton
Battery type12 V 8 Ah, GT9B-4
GearboxYamaha R6Kawasaki Ninja 400
TypeSequentialSequential
ClutchWetSlipper
DriveChainChain
Chain type
Gears count66
Primary ratio1.9552.219
Final drive3.02.929
1. gear2.846 (110 km/h)2.929 (58 km/h)
2. gear1.947 (161 km/h)2.056 (82 km/h)
3. gear1.556 (202 km/h)1.619 (104 km/h)
4. gear1.333 (235 km/h)1.333 (126 km/h)
5. gear1.19 (264 km/h)1.154 (146 km/h)
6. gear1.083 (290 km/h)1.037 (163 km/h)
ChasisYamaha R6Kawasaki Ninja 400
Frame typeDiamondSteel trellis frame
Front susp.Telescopic fork USD, 120.00 mm travel41mm fork, 120.00 mm travel
Rear susp.Swingarm link, spring/gas-oil damperMonoshock, 130.00 mm travel
Summary

The 2003-2004 Yamaha R6 and 2018-2020 Kawasaki Ninja 400 are legendary motorcycles with their unique features, targeted at different audiences.

Basic Characteristics: The 2003-2004 Yamaha R6 boasts of a 4-stroke, 4-cylinder, and liquid-cooled engine that produces 108 horsepower. It has a sleek, aerodynamic design and weighs 357 pounds. On the other hand, the 2018-2020 Kawasaki Ninja 400 has a 4-stroke, parallel-twin, and liquid-cooled engine that outputs 44 horsepower, making it more economical and fuel-efficient. It weighs 366 pounds and has an eye-catching, sporty design.

Targeted Audience: The Yamaha R6 is primarily designed for serious motorcycle enthusiasts who seek adrenaline, speed, and performance. It's ideal for advanced riders who prefer high-speed maneuverability and agility on both the track and the streets. On the other hand, Kawasaki Ninja 400 is designed for entry-level bikers who are learning to ride or want a lightweight and beginner-friendly bike with reasonable performance.

Best Points Compared to Each Other: The Yamaha R6 has a more powerful engine that makes it faster, sharper, and more responsive on the road. It’s great for those who want to try their hand at racing or prefer thrill-seeking, high-speed riding. On the other hand, the Ninja 400 is affordable, easy to ride, and has a comfortable riding position suitable for longer rides. Additionally, it's more fuel-efficient, making it an economic choice for daily commuters or riders looking to save some bucks.

Areas Where They Shine and Let Down: The Yamaha R6 stands out in its top-end performance, precise handling, and sporty design. It's great for racing, aggressive riding, and showing off on the street. However, it's not ideal for extended rides or at lower speeds. Additionally, its high-end fuel and maintenance costs make it less practical for some riders. On the other hand, the Kawasaki Ninja 400 shines when it comes to rider comfort, fuel economy, and ease of use. It's perfect for beginner riders, daily commuting, and longer trips. However, it might not satisfy experienced riders looking for more power and speed.

In conclusion, both the Yamaha R6 and Kawasaki Ninja 400 are impressive motorcycles that cater to different audiences with varying needs. When choosing between them, understanding one's riding style, skill level