All three motorcycles you mentioned, the Kawasaki Ninja 300, KTM 390 Duke, and Yamaha R3, are excellent choices in the middleweight segment. Each bike has its own unique characteristics and features, so it ultimately depends on your personal preferences and requirements. However, considering your height of 5 feet 7 inches, here are some factors to consider:
Seat Height: The seat height of a motorcycle is crucial for riders with shorter inseams. The Yamaha R3 has the highest seat height among the three at around 30.7 inches, followed by the Kawasaki Ninja 300 at approximately 29.3 inches. The KTM 390 Duke has a relatively lower seat height of around 32.7 inches. So, in terms of seat height, the Kawasaki Ninja 300 might be the most comfortable fit for your height.
Riding Style: Consider your preferred riding style. The KTM 390 Duke is known for its aggressive naked bike design and sporty performance. It offers a more upright riding position, which can be comfortable for city riding and spirited cornering. The Yamaha R3 and Kawasaki Ninja 300 are sportier in nature, with a slightly forward-leaning riding position that provides better aerodynamics on the open road and track.
Performance: The KTM 390 Duke has a larger engine displacement and offers more horsepower compared to the Kawasaki Ninja 300 and Yamaha R3. It delivers strong acceleration and can be more suitable for riders seeking a higher level of performance. The Kawasaki Ninja 300 and Yamaha R3, on the other hand, provide a good balance between performance and ease of use, making them suitable for riders transitioning from smaller bikes.
Brand and Reliability: Consider your familiarity with the brands and their reputation for reliability. Kawasaki, KTM, and Yamaha are all reputable manufacturers known for producing quality motorcycles. However, it's always a good idea to research the specific model year and any potential issues or recalls associated with each bike.
Ultimately, it's recommended to visit local dealerships, sit on the bikes, and ideally, take them for test rides to see which one feels the most comfortable and suits your riding preferences. Assess factors such as ergonomics, power delivery, handling, features, and pricing to make an informed decision.