Both the Suzuki Gixxer SF 250 and the KTM Duke 250 are popular motorcycles in the quarter-liter segment. While both bikes have their own strengths, let's compare them based on your main concerns:
Reliability: Both Suzuki and KTM are reputable motorcycle manufacturers known for producing reliable bikes. However, Suzuki has a long-standing reputation for producing reliable motorcycles with a strong track record of durability. The Gixxer SF 250 is generally considered to be reliable.
Refinement: The Gixxer SF 250 is praised for its smooth and refined engine performance. Suzuki has focused on reducing vibrations and delivering a comfortable riding experience. The KTM Duke 250, on the other hand, is known for its aggressive and sporty character, which may result in a slightly rougher ride compared to the Gixxer.
Maintenance cost: Suzuki motorcycles are often regarded as cost-effective in terms of maintenance and spare parts. Suzuki has a wide service network, making it relatively easier to find authorized service centers and affordable spare parts. KTM, on the other hand, may have slightly higher maintenance costs, and their spare parts could be relatively more expensive.
Build quality: Both bikes offer good build quality, but the Gixxer SF 250 is known for its solid construction and attention to detail. Suzuki is known for its robust build quality and fit and finish. KTM, on the other hand, focuses on lightweight construction and aggressive design, which may result in some compromises in terms of perceived build quality.
Mileage: In terms of mileage, the Gixxer SF 250 is known to deliver good fuel efficiency. Suzuki has worked on optimizing the engine for a balance between performance and fuel economy. The Duke 250, being a more performance-oriented bike, may offer slightly lower mileage.
Considering your concerns, if reliability, refinement, maintenance cost, build quality, and mileage are your main priorities, the Suzuki Gixxer SF 250 would be a more suitable choice. It offers a good balance of all these factors and is known for its reliability, refinement, and cost-effective maintenance.