The sweet cruising speed for a Suzuki Gixxer SF 250 on long rides can vary depending on several factors such as road conditions, rider preference, and bike condition. However, as a general guideline, the Gixxer SF 250 is designed to offer a comfortable and efficient cruising experience at speeds around 80-90 km/h (50-55 mph).
At this speed range, the engine is typically operating smoothly within its optimal RPM range, providing a balance between fuel efficiency and performance. It allows for relaxed riding, reduced engine stress, and better fuel economy, making it suitable for extended journeys.
That being said, it's important to note that the sweet cruising speed can vary for different riders. Some may prefer slightly higher speeds for a more spirited ride, while others may prefer a more leisurely pace. It's always a good idea to consider factors such as traffic conditions, legal speed limits, and your personal comfort when determining the ideal cruising speed for your long rides.